use the extra gut to your advantage.. personal decision.. do you want a six pack with no meat? or do you want a bulky six pack that says your buff? you pick. pick bulky do resistant core trainning. grab DB and do sit ups, woodchops, ankle weighted hanging leg lifts. you'll get there in no time don't loose the skin pack the skin!!!.
about the improvement you gotta take more pictures then that... where are the wheel shots? and back? sides? c'mon can't say much with what you offered. good luck bro