How is it not a radical change?
They've added an entirely new color to their jerseys both top and bottom, they've changed parts of the helmet, changed the numbers, the sleeve stripe, the lettering, and supposedly are going to add different stripes to the side of the pants. And that's just from what we know, who knows what the official jersey will include.
Perhaps people were expecting a total rebrand. For me, though, this is about as radical as you can get without totally changing the Browns colors or name.