I'm still not sure why he gets bonus damage on creeps without a talent though. Pretty much every other hero has to talent for it, besides Stitches long cd single target eating thing, but Leoric blows up entire wave in one skill. I guess it's the only skill that hits creeps but still it's kinda weird design, most warriors are just shit at clearing creeps quick and have to talent to get better at it, which feels like a fair tradeoff. It's not even thematic, or at least only barely(like in D3 he can kill his own skeletons when he swings his mace which I guess where it comes from, but at the same time he doesn't one shot them unless you're playing on normal so...).
Looking forward to medic, however it's quite a while away before I'll buy her since for some fucked up reason they add new heroes at 15k gold instead of straight 10k, which means buying it during the first week is a huge waste of gold. The worst way to do an incentive to buy it for real money. That and every hero they add is 10k it seems. I guess they might make Artanis not 10k as a show of good will, and also because you can get him for free if you buy the SC2 expansion anyway so it's like whatever.