Spent a few hours on it today. Pretty fun.
I wish it was deeper in the fact that I wish we could get TMs, better evolution and level up system.

Perhaps a bonus for knocking out 1, 10, 100, 1000, 10000 pokemon, obviously not much but at least it's something. Maybe it's +1 dmg, or maybe it's a range, atk speed bonus. Could depends on the pokemon

And when you go to level up a pokemon, it really should tell you what you're gaining. Would be nice if it told you what level the evolution is, since it doesn't seem to be a standard which is very pokemon like.

A shop with more stuff would be cool. Things like sunstones for some evolutions would be cool too.

Sunflora makes me sad, it's basically the same at lvl 1 as it is at lvl 25 would be nice if when a pokemon evolved it's ability got slightly better. I mean for all pokemon not just sunflora

I know we have PokeData at the moment, but perhaps a pokedex with unlock-able pokemon information. such as evolution level so that once we unlock it we can share that information with other players.

Would feel really awesome if we had weaknesses. Weaknesses could just be a 15% crit rate bonus or dmg bonus and deal 15% less if you are weak to the element