Improvements: Build/ Role Diversity.
So I have been playing league of legends a very very long time. During this time the roster of hero's has grown and grown. With every new champion that comes out, Riot attempts to bring new interesting concepts to the game. However, what I have noticed is for every new release, the older characters I love seem to fall further and further back to the recesses of thought. It is hard to balance all the champions when you have so many to pick from. My beef isn't with balancing. My beef is with the limitations of design and diversity. Below is a brief overview of what I would like to see changed.
Build Diversity It is all to common that when we pick a particular character a veteran player can instantly look at them and say... they are going to build AD or AP. Team comps become predictable and easily countered not only by character pick's but by itemization against a selection. This to me over time becomes extremely boring. Fizz is an example of this... AP burst Assassin sure! What if though I built his sea stone trident with BOTRK and an AD shred build? Akali is my biggest frustration. She was built to be a Hybrid champion... yet she is only ever built AP? She needs to be able to build on either front that give her two different "personalities". AP burst assassin, or AD melee assassin.
Role Diversity One thing I hate after being a jungle main for so long is having to use the same junglers all the time. Some of them I don't like, which makes me select only a few that I actually do. Being a veteran to the jungle I have always had the question... what if? What if I took a champion who is made to Mid lane or Top lane and tried to jungle with them? Take Katarina as an example. She has a kit design that has almost everything you want out of a jungler. She has an amazing gap closer, a high burst damage potential, and with no mana consumption, she could stay in the jungle forever health permitting. However, because of her stats she can barely even make a dent in the jungle. Clearing camps is something she can barely do in AD and absolutely has problems doing in AP. Yet she is absolutely a roaming assassin so what better role than having her a jungler? Sadly she is stuck in mid lane, roaming only when able to secure kills.
Conclusion I just don't see off builds, roles, etc. as prominent as it should be with a towering roster as League has. I don't like always walking into a match with or against a particular champion and knowing exactly what I have to do to counter them. While certain champs have a required damage build either AD or AP. I want to have to guess with some... are they going AD? are they going AP? Will we see them in lane? Or will we see them in the jungle? I would like to see the mystery unfold not during champion selection all the time but after as well. I want to make people guess who and where certain players will be going. Pro players have been known to use champions that are usually slated for a certain role, and completely changing the meta of that character by taking them somewhere else. Though this is effective in pro leagues... this is a one trick pony type idea. Once it is used it fades away. I want to see more diversity not just in character designs... but role and build designs as well.