Geez, don't you hate it when all of these Marvel things just end in a giant CGI battle? Oh wait...this is Star Wars?
It wasn't AWFUL, but yeah, I could feel like a lot of the series was just a way to get to the final episode because they had some cool ideas like, let's see a Rancor battle some Scorpion Droids in the city, or let's have a scene with Boba and Din fighting back-to-back against the Pykes! I feel like there was a lot of set-up to get to these "cool moments" but it all felt a bit mish-mashed together. And yeah, Grogu's inclusion just felt like they wanted to show off what bit of Jedi training he had received.
I'd say the series as a whole is a VERY mixed, bag, and only half of the episodes were any good (2, part of 4, 5 and 6). The finale was OK, but after the first ten minutes, it was just one drawn-out fight with strewn together scenes, which, while entertaining, started to feel a bit TOO drawn-out near the end. At least, they gave us the Boba/Cad show-down, and I guess that's the end of him!
As for Cobb Vanth being in the Bacta Tank and the Mod guy being there, I guess he'll return in the future with some modifications. Might be neat to see him with a cybernetic right arm since he was shot in the shoulder. It might make him a faster gun-draw!
As for Din/Grogu, they definitely left it wide-open as to what they'll do next, but yeah, I had secretly hoped he was going to stay with Luke at least for part of Mandalorian S3, but now that he's back with Din, maybe he'll learn to wield the Dark Saber and become a Jedi/Mandalorian like the original wielder was.
-Marc.