This is a great read. Even explains why we don't see any OP_RETURNS in use by XCP today. The code has a comment about BTCGuild but this explains further.
This is pretty good, thanks for posting.
This really exposes a much more important issue about where the Bitcoin 2.0 crowd stands versus the Bitcoin crowd. There seems to be an unreasonable amount of ill will towards people building on top of the blockchain, regardless of if they are paying their fee's or not. Not to mention that if bitcoin is going to work it's going to need to scale to an enormous volume anyway- so it's not like the problem won't need to be solved at some point.