Going from LoL to HotS
I started playing HotS recently and I found it very enjoyable even in ranked play. The thing that I noticed help a lot was the lack of an all chat. Now I'm not saying its a bad thing, but for ranked I feel it should be left out. Keeps your team more focused on themselves and helps them not rage as much.
Also another thing I liked was the lack of lanes. The go where you think your needed mentality. Instead of the current sit in lane until a tower goes down with the same champs in every lane near almost every game.
Now for the actual gameplay. The lack of a surrender button has lead to me winning more games because I tend to focus on late game not trying to win something before the enemy spikes. Also it actually reduces toxicity. You still get the occassional toxic person but they are usually the bad people and not the better people. Once I broke about rank 25 (in like 10 games I might add where you go rank 50->1) the toxic people nearly died out.
Now they do have their differences. Including the not farming and no items. But the core MOBA is still there. It's a 5v5 where the team decides the game not a single player. Also the no promo system and straight points to move up system is really nice.