VOORHEES, N.J. — Under general manager Daniel Briere, players that are already Philadelphia Flyers prefer to remain Philadelphia Flyers.That was reinforced again on Wednesday, when the club announced lengthy contract extensions for goaltender Dan Vladar (not surprising) and left wing Tyson Foerster (kinda surprising). The numbers for those deals seem reasonable, too — Vladar got a five-year, $5.5 million AAV extension, which is below market value for a No. 1 goalie, while Foerster’s eight-year, $7.1 AAV extension could be a massive bargain if the young, two-way winger keeps developing the way he has been the past few years.Owen Tippett, Travis Konecny, Cam York, Noah Cates — all of them have signed significant extensions since Briere took over to spend the bulk of their prime years in Philadelphia, while restricted free agents Trevor Zegras and Jamie Drysdale are likely to do the same at some point over the next few weeks, too.“Our guys want to stay here, and to me that’s a really good sign,” Briere said.It is.But it’s not good enough if the Flyers are to eventually become a legitimate Stanley Cup contender. That’s what made Wednesday, and the past couple of weeks, slightly disappointing.Yes, the Flyers added some nice depth pieces in Noel Acciari for the fourth line and Joseph Woll earlier this month to reinforce the goaltending as the No. 2 behind Vladar. The big, splashy move everyone is waiting for hasn’t happened yet, though, and although opening night is still more than three months away, it now seems unlikely to come before that now that July 1 has come and gone.Briere believes the Flyers’ surprising success this past season in advancing to the second round of the Stanley Cup playoffs, coupled with their own players wanting to make Philadelphia their long-term home, will be enough to convince high-end talent to consider them a team on which they can ultimately win a Stanley Cup. That’s going to be vital considering the abundance of trade protection all of those players seem to have.“I think the league is starting to take notice,” Briere said. “They’re starting to realize there are some good young players on this team, and it’s a good mix. You’re definitely seeing a lot more interest than we’re ever had. Two years ago, we were on most players’ no-trade list. Even the (players) that had limited no-trade, we were on them. That’s starting to change.”But it evidently hasn’t changed enough, considering how the past few weeks have played out.Dylan Larkin is likely to get traded from the Detroit Red Wings at some point. The Columbus Blue Jackets’ Zach Werenski was on the trading block the past few days, until it was suddenly announced on Wednesday afternoon that he wasn’t. It stands to reason that if either of those two stars really wanted to become Flyers, they would have, considering the glut of NHL wingers the Flyers possess along with a full complement of draft picks/young players/prospects they’re willing to dangle for players of that caliber.Free-agent defenseman John Carlson is looking to join a contending team for another chance at a championship. He remains a free agent as of Wednesday evening. Carlson would fill an obvious hole on the Flyers’ roster as a needed top power-play quarterback. If he viewed Philadelphia as having a realistic chance to do damage in the playoffs, though, he likely would have signed up shortly after hitting the open market at noon.Asked whether Carlson — or Claude Giroux, with whom the club has been in contact about a potential return — could still sign with the Flyers, Briere said: “We’ve had some discussions. I can’t say much more than that. We’ve had some discussions. We’re looking at everything. But at the moment, there’s nothing imminent.”To be fair to Briere, this year’s free agent class was incredibly thin, so options were limited. There wasn’t all that much to bid on, and Acciari does fill a void as a fourth-line upgrade over Garnet Hathaway, whose game dramatically declined last season and who was dealt last week to the Florida Panthers. Acciari is a gritty veteran with playoff experience who had a positive impact in the Flyers’ first round win over his Pittsburgh Penguins in April.Further, the success of next season’s Flyers team will depend primarily on whether the young players collectively improve as a group. Porter Martone is already the odds-on favorite for the Calder Trophy, and the Flyers should get more out of Foerster, too, after he missed four months due to injury. Those two alone are are gigantic additions.If others like Zegras, Drysdale, York, Matvei Michkov, Denver Barkey and Alex Bump all keep improving, the Flyers should again be in a position to challenge for a playoff spot no matter what else Briere does from here. Briere not wanting to mess too much with that core does make some sense, and a year from now, he’ll have a better idea of who should remain and who might be expendable.When asked if there was any disappointment over the Flyers being unable to secure a high-end difference-maker to this point, Briere said: “We’ve preached patience from the start of this three years ago. That’s the fine line that we’re trying to stay on, where we’re giving a chance (to) our young guys to get better. It paid off last year. … You try to help them with small steps here and there, and if you have a chance to take a big leap, we’ll jump on it.”Maybe it happens at some point over the next few weeks. Because simply keeping their own, while letting their young players continue to marinate, will only take them so far with no more top-five picks likely on the horizon. The urgency to do something of true significance is only going to ramp up the more time goes by.