Kalos had potential as a region, but like everything GF does, it left "a little" to be desired in terms of execution. It feels obviously unfinished; I'm a firm believer that a Z version was planned and that we never got it is a travesty and disservice to the region.
Sun and Moon were some of the best games since D/P/Pt, in spite of their very many flaws. USUM were a big step forward in game design/balance, completely ruined by a litany of horrible unnecessary tweaks to the story and the subsequent removal of some of SM's most iconic scenes ("Y'all are stupid!" for instance).
SWSH were a return to form in being overall disappointing. The first half or so of the game felt alright, but as time went on the game felt more and more rushed and unfinished. Piers and Opal are some of the most memorable gym leaders in recent history, and I quite liked them. However, in addition to the obvious unfinished state, I think it was really awful how they seemed to mostly be devoting a whole game to the gym challenge again for the first time in God knows how long, only to pivot and do a crazy over-the-top doomsday plot at the last second for no reason.
