I find that albums and bands I turned away from for changing band members in the past, as I get older I'm more open and chilled to listening to their stuff from that period. Sounds like the OP's taste is pretty similar to mine too!
Poison firing CC DeVille and replacing him with Richie Kotzen angered fans who just wanted more hair rock, yet there's little doubt that Kotzen was, and still is, an excellent guitarist who wrote some great stuff and on reflection that album has some good tracks. Just don't feel like Poison tracks.
Similar with Kiss. No Peter Criss or Ace Frehley for decades but for a long time my favourite era was with Bruce Kulick on the axe. Still love that MTV unplugged set though with them all coming out on stage.
Van Halen is one that has always divided fans. I prefer Roth but I wouldn't turn it off if a Hagar song came on. I did struggle with Gary Cherone going there though, especially as I was a huge Extreme fan so it was like ruining two bands in one swoop.
Aerosmith breaking up the toxic twins and replacing Joe Perry and Brad Whitford would have been huge, and whilst the album produced without them can be said to have no real standout tracks, it's doesn't have many bad ones either.
I wasn't too happy about Guns n Roses losing Izzy Stradlin, or taking on a keyboardist as a permanent member, but the Use Your Illusion albums turned out pretty good.
Have seen Skid Row a few times post Sebastian Bach and although they're still very good you're always going to think of the era and those songs as being the definitive.
Blackie Lawless and Chris Homes falling out was big too, what with Blackie even dropping the fake blood and guts props and doing a reborn Christian thing, but there were so many replacements that I'm just glad they finally found some stability and could knock a few more songs out. Even if he won't play certain animalistic ones any more
I know Hinder. They got selected via a rock talent show with Motley Crue as judges, or at least Nikki Sixx I think. Fantastic debut album, All American Nightmare was great, but I didn't listen to the others much thereafter though.
Speaking of the Crue, John Corabi didn't work out well and he was hardly given a fair crack, but even despite what happened with Vince Neil people still wanted that classic line up.
But, to bring it back full circle, now I'm middle ages myself I'm just happy to get to any gig nowadays, and much less bothered about whether it is the actual guys who lived and breathed the life playing the songs, if the effort to putting on a great show is there.