I'm a big vette fan...but that looks like a tarted up Camaro
Do not like rear. Exactly like you said. The rear needs to be more feminine. It's been said that the best car desgins mix masculine and feminine cues. The should add a rear defuser, keep the lights round, and bodywork "humped" over each light. The rear backlight should taper down, the rear wheelwells should flare out, with ovoid brake intakes on the inside "haunches".
The side scoop should be more prominent, like the F40's, but still keep the Corvette look.
This should be more of "3 arc" design.
The front I like.
**Edit, it wasn't until a few months ago I noticed a several artists renders of the upcoming Ferrari F70, that I wondered "why can't the Corvette have more 'organic' cues, yet still be aggressive?"
for instance, I mentioned the wheel flare and side scoop, if the upcoming C7 ZR1 had a side scoop like this

it would be awesome...yet look at the "arc" over the wheels, of course this is a mid engine car, so the arc will be tighter, so for the Corvette it needs to be drawn out,
Now look at this model...look at the vents, look how organic they are, imagine that on the C7's hood and on the rear huanches.
