The size doesn't bug me, Studio Series Jazz is fantastic at a reduced size.
But the 'shield' cop out really does. It's weak design work, the same as it is on Arcee. I could forgive it if transformed further to actually become a shield but in both cases it's an obvious piece of cars. Holding on to an old TV doesn't make it a shield, and standing on a sideways fridge doesn't make it a hoverboard. Not sure why these guys are getting passes on this point.