1. Get RJM Clutch Pedal
if still not happy
2. Turn off rev matching
if still not happy
3. Get light weight flywheel
if still not happy
4. Get urathane tranny mount
if still not happy
5. Get mustang
Every problem you're describing i was struggling with when i bought my Z and hated the car because of it, then i bought RJM clutch pedal and it made a 1000% difference, but i wasn't truly happy untill i turned off rev matching, because it holds RPMs up for a second or 2 because it doesn't know if you're going to downshift in which case it needs to rev up, which is stupid if you're in first f-u-c-k-i-n-g gear! anyway i drive a 2010 non-sport and love it, i think Z is the best sport car you can buy but you have to mod it to your liking once you do:
