The only Wolverine who appeared in Deadpool 2 is the one from footage from Origins who's the same as the Wolverine in all the other films.
I think its either the Wolverine of the post-DOFP timeline (who's also technically the one from the other films, but likely not the one from Logan.) Or maybe the one from the earth where Binary ended up.
Honestly, I think an X-men reboot is probably the only thing which can restore the MCU to its old glory. Even rehashing the glory days of the Avengers won't cut it beyond a point. Once the nostalgia-fest leading upto Secret Wars is over, I think audiences may be more excited by the prospect of a new Cyclops, Storm, Rogue etc. than the prospect of a new Tony Stark.
I think there's a sense that they don't know what they're building up to anymore. The previous three phases were all building upto something, and collectively they were all building upto Thanos. Phase 4 seemed more like an Infinity Saga coda than anything else. Like "the glory days are over, here's us experimenting with what's left of the sandbox".
Nothing wrong with that either. But the quality of individual films matter too. Phase 2 also seemed to lack focus compared to Phase 1 and Phase 3. But it had films like Iron Man 3, The Winter Soldier and Guardians of the Galaxy. The only truly standout film from Phase 4, IMO, was No Way Home (technically a Sony Spider-Man film), and maybe Wakanda Forever.
The shows have also taken away some of the focus I feel.
All well and good, but at some point we're getting that reboot. Continuing the X-men's cinematic legacy with the ageing OG cast is about as feasible as DC/WB's now aborted plan to make Michael Keaton's Batman the lynchpin of the rebooted DCEU.
Also, retiring Iron Man and Captain America, while great from a narrative perspective, hasn't worked out too well for the MCU from a business/franchise perspective. I can't see them making the same mistake with the likes of Wolverine.
Feige's statement about recasting with regards to Alfred Molina and Willem Dafoe also needs to be taken in context. From a practical perspective, you can do Spider-Man films without needing to reboot Doc Ock and the Green Goblin, since there are tons of villains and story-arcs that have yet to be explored on-screen. But from a practical perspective, its' extremely hard to run an X-men franchise without the likes of Cyclops, Wolverine, Storm, Professor X, Magneto etc. Nigh-impossible in fact. I mean, there's a reason why the MCU recast Spider-Man with Tom Holland in the first place. Wasn't Tobey Maguire also not 'perfect casting'? Or Andrew Garfield (at one point they were considering folding him into the MCU I believe)?