If you want Scheme, go use Scheme because these are not arguments for Common Lisp. There is tons of value in the CL specification being this big and I'm happy I can still run code I wrote more than 25 years ago (or third party code written more than 50 years ago) without any issues.

Generally, contemporary folks that propose improvements to the CL spec tend to be misinformed / misguided and/or lacking experience to realize why their proposed improvements are bad ideas.