Honestly, I'm not sure what people are complaining about, it is supposed to be highest difficulty setting there is which is not hardcore mode. Of course it's supposed to be difficult that's the whole point?
And things having higher armor and vitality so you won't be able to reliably cc and kill them all while laughing, on classic you can build half optimal party and literally sweep through everything so far half asleep.
And yes I started tactician and it seems to be unfair at the beginning, but from classic playthrough I know that eventually you get to the point where you become so retarded strong that only chance to challenge you is some sort of cheese like splitting the party or outright overwhelming level difference. Like my classic playthrough tank can probably kill half a frikkin' spawn by himself no problem with reflection, damage and sheer toughness and wizard can frikkin AoE nuke the faces off if he crits right through magic armor, not even talking about ranger twoshotting shit from across the map.
It's just pure numbers problem the one you solve with gear and stacked skills and powerups. Issues is you don't have it at the start, but as it was first game you start slow but then snowball into ridiculousness if you min max.
Besides it's like week one, I bet in two months when all the broken OP shit builds and cheese tactics are discovered people will roll through tactician, just like in original.
