Welcome, rclbud, glad to have you on the forum. You have a great little Kimber, but some of them need broke-in despite the belief otherwise. Then again some have problems that need to be addressed by Kimber customer service and perhaps a trip back to Yonker-ville.
From my experience with my Micro:
- break-in is from 300-500 rounds
- Kimber likes to be clean and lubed wetter when new
- break-in with FMJ round ball ammo that is 95-100gn
- Use defensive ammo after the break-in period.
- Buy extra recoil springs; you will need them
I can't help with that slide release problem you had, as I never experienced that with mine. That ain't right?!
My advice is to clean and relube carefully and use the ammo I (and others) have used to complete the break-in. Report back.
Again, the Kimber Micro is a great little gun. You have a purchased a desirable model. In time it will perform well for you. You are just not home yet.
Lastly, You are absolutely correct that an expensive Kimber should be expected to perform perfectly out of the box. Life can be frustrating sometimes.