Riot, I really hope you'll give melee carries a chance at fulfilling an important and unique role.

Compared to tankier, more cc-oriented top lane fighters and tanks, melee carries really don't shine in any area. This is apparent in champions like Gangplank, Fiora, Tryndamere, and the rest of the melee carry champion subset. They're even split across categorizations when Master Yi, a melee carry, is placed into the assassin category while Fiora is placed into the fighter category, though they perform almost identical roles. If you could perhaps allow these melee carries to function effectively in place of marksmen or have their own unique role and visibly different and powerful strengths, then give them a new classification, you'd be able to balance them and their kits according to that classification.

Master Yi is a great example of a well-designed, unique, powerful and viable melee carry that can even sometimes effectively replace a marksman in a standard team composition. Most of the time however, he's played in the Jungle. The main differences between Master Yi and standard marksmen are that a standard marksman is stronger in lane and in team-oriented siege pushes/fights, whereas Master Yi is stronger during his mid-game power/reset potential spike and in and split-team split-pushes.

Yasuo is also a very powerful melee carry who can replace a marksman in split strategies, but is instead played mid because he has quite a strong laning phase that could be played in the side lanes, but is even stronger versus mages who can't dish out constant poke DPS (hence the mid play).

I would love to see melee carries have their own categorization and kits balanced specifically around what they're designed to do.

TL;DR I want to see more role diversity within the definition of carry instead of having it be limited to ranged marksmen, such as melee carries with sufficient counterplay and carry potential.