Two BIPs have been added on the forum:
BIP 1: BIP 1 - Reduce CA minting cost
BIP 2: BIP 2 - Directing CA mint fee to miners
These cover the above discussions, and have aimed to address the feedback that has been shared here. Please vote, and ofc let us know if you have any feedback 
Voting is live and will be open until 1 PM GMT Friday the 13th. Be sure to vote before the cutoff.