@digdeeper @rlier23 I'd rather say they've been in a downfall since B2W2, which also happens to be the last game the original developers were still working on.
From XY they were either taking up a bloat position (director, observer, commander in chief), or they've left the company (as can be spotted in the credits screen).

Though XY was good enough, SM and USUM were ok-ish, 剣盾 was meh (I did feel like they deviated from the original formula way too much here), and SV doesn't quite give me any positive thoughts as each trailer went from one red flag to the other.
Though Arseus was pretty nice, but gets boring quick once you defeat Woro.