I went for muscular front legs in a sort of gorilla fashion.
( I thought it might make it more interesting .. in any case, you can actually resize them just a bit more larger)

As per the wings I was working on some sketches I found and by using a somewhat cross-principle when seen from above flying (if you get what I mean) That´s why it needs the massive wings.
In the new pic you submitted I noticed you changed the wings to a larger size, yet you pulled them backwards. The first impression I got was ".. looks like it´ll fly as a wasp or something..".

You can use the bones I sketched in mine to make your wings as they were based in bat, and pterodactil wings.
(The lower one is actually the wing folded).

Hope it helps.