Actually, a large # of worlds were LC worlds, most specifically, worlds that had just been returned to them in the last 5 years.
A huge # of the Tamar Worlds that the LC had JUST recaptured from the Combine, reversing 1st/2nd SW Losses in the 4th SW, were then turned around & given away to the FRR which was IIRC how Teddy got Takashi & other Hardliners to swallow the deal, or something that C* mentioned anyway, is that those "losses" from 3028-3030 would no longer be going to Lyran Coffers so to speak.
The LyrCom wasn't a big fan of this but, it did create a buffer state & they couldn't be looking to be hypocrites for "freeing worlds" only to "stop them from full freedom".