Uncapping the block size is not controversial to any miner who is committed to ABC long-term. Keeping the block size capped so that we can "scale" IS controversial to a lot of miners.
So then why is CSW so adamant about going to 128 MB instead of just uncapping the block size now?
I'm not 100% sure but I think there needs to be a bit of a code re-write to get it completely off. Could also be an excuse for one more hardfork to get the last of the old opcodes back