Lets assume SW/SH has somewhere around 400 available pokemon in game. Putting it about even with OR/AS, and more than sun/moon.
Pokemon bank already exists as somewhere you can manage your pokemon, so you aren't missing out on that. The only thing you are unable to do in SW/SH, is transfer pokemon to the game, once you are already finished with it, to complete any postgame content or battle friends.
Let's be real. The postgame content was pretty awful in Sun/Moon, X/Y, and even Black/White. I'm not particularly optimistic there will be much post game content in SW/SH either. The only real limitation is battling pokemon online, which could easily be implemented in pokemon home.
I don't really need new pokemon models every 2 years, but I have wanted explorable overworld. I have, particularly, wanted a coherent setting, which was really lacking in Black/White and X/Y. If the changes to the pokedex make that more possible, then I am happy.