He definitely needs slimming down by quite a lot. At the moment, he's bordering on tubby. The guy is supposed to be a stealthy, powerful creature of the night. This desire to ape TDKR has puffed him up way too much. A sleeker, trimmer, more agile Batman is the way to go.
Batman, like he is depicted in the movies and comics couldn't possibly exist in real life. He needs to be huge and very strong to do a lot of what he does, but he also needs to thin and agile to do a lot of what he does. You can't really be both.
Although i think the best bet is to portray him like a freak NFL athlete. Those dudes who are huge but can still jump incredibly high and run very fast. Some of them are a little fat too, but they're amazing athletes.
Cutting down on the size makes him less believable to me. Batman is consistently fighting huge opponents, and sometimes in large numbers. Besides his martial arts skills, he does need to be much bigger than the average human to make it look so easy and endure so much punishment. Plus, he frequently displays almost superhuman strenght, so it makes sense for him to be huge. And it also looks more menacing.