Nearly everything in it is unique and hasn't really been done in LoL (except his Counterstrike). I especially like his Lightning Surge, which has such a unique mechanic to it.
Please have Riot's Champion Designers look at this.
L Rayquaza1 votesWhat about Abathur? He is way more unique
darkdill1 votesI've done a topic on Abathur before, and Abathur wouldn't work in LoL because of gold and items, and the fact that EXP is team-wide in HotS rather than per-player.
Don't get me wrong. I'd LOVE Abathur in LoL, but he's incompatible with LoL's gameplay.
YuGiHo1 votesAna is the one they should look at, a healing support that heals through skill shots and can shutdown other healers. She Is a support that actually takes a little skill and rewards u appropriately unlike most similar supports in league who's supportive skills are mostly point and click other than 
whos as a support is considered a meme
Eternum Nocturne1 votesI look at DOTA and heros and notice how unique the characters are. Sadly league has a shit ton of abilities that are virtually the same, like the cone ability, or the circle that explodes ability, or the circle that deals damage ability, or the cone ability, or the trademark 3 hit passive ability, or the cone ability.