it isn't OP IMHO, but it does great damage against AT guns and infantry/weapon teams. Plus its grenade toss ability lets you drive up near an AT gun and clear it.
yeah, it's a solid all rounder medium like the IV or cromwell but with 1400hp. the price might be a tad bit low but the unit is designed to be part of a combined arms approach (as opposed the the comet or V which is that vehicle plus infantry) and so it has to be affordable. i don't think the cost could be raised beyond 160 fuel. the grenade is a whole nother issue and i think it's cool but could use some tweaking, both so it's more responsive and so it doesn't wipe setup teams as easily.