I agree. The JL suit looks cool, but I think I'd prefer the BvS suit. So far, that's two future Batflecks (SS and JL regular suit) that I'll safely pass on. I'm sure he'll have additional suits in JL, so we'll see what those offer.
The new cowl doesn't have a clear separation around the ears. They went for a more Jim Lee styling but even in his drawings you can tell they are separated, the lack of shine or sheen or highlight makes it look like one piece that awkwardly dips for the head. I am surprised they could pull off black on black with a black belt and not make it look completely washed out.
Plus he's surrounded by metahumans and fighting Parademons + other-worldly adversaries...I think it's logical that he would add armor to his original suit that he's used for 20 years until Superman, WW, etc. arrived on the scene