The engine is far too big. Maybe take the command bridge a bit higher and remove this wing on engine. Then you could place two wings on engine's sides buuut.. Placing 3 engines (one big and 2 smaller next to it) would be better after all IMO.
Fine for me as well, except that it is slightly larger than other medium battleships. Could use a stats buff, considering that it only has 1 heavy turret.