Heim nerfed? or at least same or buffed?

Before talking: sorry for bad English since I'm not an American.

• Before having patch on Heim, his turrets were like "Ah, it's a little annoying but I could handle that anyway." And the abilities of him like Hextech was non-targeting skills, whcih means we couldn't get hit through walls or hills whatever people call. After having patch, "upgrade" concepts became totally different. It affects to all the other abilities so that once he get at least equal status against opponent, he could be above the opponent(s). Also, before the patch, turret's upgrade was becoming "icy turret"(sorry for poor metaphor) and get slow effects to target(s). But now it became: "WOW". Did heim get nerfed or buffed(at least same as before)?

My opinion: he doesn't even need wards for playing mid lane(usually), and in team fight, he plays more HUGE roles than before.

Buffed at least. It is not balanced yet, I think.