Then fork it and implement the changes - unless that is what you've been working on since March and are ready to release some alpha or beta code, which would be cool.
Code will give some very good data as to how it works, potential issues etc. Discussing it here will do little, but since it is open source, implementing will do a lot.
Sounds like "bitfreak!" might have implemented something not quite the same as a rolling root... I'm not sure why he's getting rid of unspent transactions after 1 week though (sounds like a bad design choice, but maybe I misunderstood when I skimmed it).
However, I am now getting more and more convinced that UTXO accomplishes the same goals as rolling root, just in a different manner. Since someone appears to be involved in implementing it, that seems like the way to go.
See this post and the replies that come after it:
https://bitcointalk.org/index.php?topic=88208.msg7423013#msg7423013