There's very few games that got people's imaginations going like the first legitimate mainline console Pokemon game, and Game Freak is not the company you expect to under-deliver up until they do. It's still Pokemon so it's still fun, but it's also still definitively the worst mainline Pokemon game for features. Pokemon Sun/Moon removed some features but kept more than it didn't, and the last game that removed Pokemon was Ruby/Sapphire in the move to the GBA, and they rectified that by re-releasing Red/Blue(Green) remakes, and the generation itself added and redefined modern Pokemon mechanics that are still used today, whereas for the most part, Sword and Shield have subtracted.
Now I'm a heavy-duty fan of Diamond/Pearl so if they release those and add a lot of the Pokemon they left out, I'll probably look on this generation more favourably.