Can you explain a bit about the mechanism wherein the miner pays into the rollover pool, and why that is different from the 'original proposal'?
The difference is quantitative. In this version the rollover effects only blocks that exceed a threshold of size.
OK, so its similar to Monero.
But there is a difference between this proposal and what Monero does that appears that it might need to be addressed.
The rollover pool creates an incentive for the miner to not use the fee pooling, and instead contract directly with the TX creators.
If implemented as written, this could become a problem. Large TX creators and large miners would have an incentive to cartel because of the way this rollover pool works.
Monero avoids this problem, but most of the rest of this proposal has been implemented and running for quite a long time. Its not new, or novel, except in ways that it is not as good.
An examination of the prior art is warranted.