Hi first post but it might aswell be feedback:
only a couple things i have found would be really nice (coming from a slight newbies POV aswell, so either take these with a pinch of salt, or consider that more newbies are getting into the game):
1) Possibly have a direct link or button that opens a new page, or window, inside the pokemon browser which brings up the Smogon page for that pokemon, allowing you to read about builds and stat layouts aswell as popular/viable movesets and the reasoning behind them, having the "Viable" list suggests that picking 4 random viable moves constitutes a viable moveset, which in reality it does not. (eg if you type in Gengar in the pokemon browser there is a link to
http://www.smogon.com/bw/pokemon/gengar right there)
2) Recently used or popular sets for pokemon, keep this as a top 3/4 thing because loads of people love making shady sets to keep people guessing, but like the viable move list this could be reserved for tested favourites or sets to look out for, defining the meta-game a bit more and also giving people a good idea of what their chosen pokemon is commonly used for.
3) When you pick a bracket/tier for you team from the menu, it should warn or notify you something like "This Pokemon/Move/Ability is not allowed in the tier you selected [OU]" ; I built a team the other day and got ready to play, and it took me up to the point of recieving a challenge from my friend (who had also spent time building his team prior) before i realised i had a pokemon who was tiered too high to compete (even though i had already stated my team was UU, then proceded to put in an OU pokemon)
Just a few ideas to consider, great job though im enjoying PS alot!