Hi friend, sorry for the delay i hope my answers could help :)
1. The sticky charge moves enemy units in the same direction you are attacking, in case the character crashes with another one, they stay in the same place.
2. Miasma Aura and Fetid Cloud need a patch, because I was testing them and I think it's not entirely clear how the ability works. But the idea behind the character is to have crowd control by combining both abilities to heal allies and deal damage simultaneously, since they are the team's support.