I would have loved if the film had a small Endgame moment with many familiar faces coming back from retirement for the ultimate battle. They wouldn’t even need to be named characters, but showing like, a Mon calamari bridge, or at least close-ups of the ships involved, would have sold the moment better.
For now the best we can do is going the Hal route and add comlink lines to the pilots, and maybe sneak in one Easter egg or two.
Regarding Baby Yoda, I have the feeling his species has a different growth rate, with a very long toddler stage followed for a sudden, quick infancy/adolescence. If Yoda’s species aged the same way as us, and baby Yoda is 50, Yoda at 900 would look like a young adult instead of being on his deathbed.