Is this irony?
I mean I don't like the idea of the TC copying the FS-LC, but FS-LC also went against a stronger set of enemies on paper after centuries of separation AND having cases of fighting each other (if admittedly proportionally rarely). Plus at the time the only distractions were WD and the CC (I put the WD as a faction as they were a severe fraction of the damage the DC experienced).
Right now the CC has the: FWL, FS, whatever stable acronym-name we get for the wolf mess, their own internal fireworks, the independent groups that need supplies near their border (RotS, SF - maybe still with a C in front, DoA, FR) and more border with the DC than before. Oh and their excuse for taking over the worlds was for their protection right? TC just pulling themselves together and NOT tossing their forces into a fiat blender deals with that issue/excuse on its own. Oh forgot they also have Jade Falcon neighbors too now - I'm not sure but wasn't their great leader the only faction head leader to call the GF "green chickens" or something in public in the books? I'm sure that is going over well.
I don't expect anything like the TC getting things from attacking, nor would I want the TC to copy the FS-LC even if they could, but reasonably this isn't that unrealistic for worlds that effort has been put into to show aren't THAT valuable. Zanzibar and Corodiz and Larsha I would NOT say that about, but the other 4 worlds? All on direct TC border, all Implied as low value, all also facing FS border without exposing CC Interior, all over a jump away from other CC worlds other than Corodiz which would be a tactically important world, and lastly only 2 jumps away from 4 other militarily supplying TC worlds plus the TC's capitol.
Not saying it's a done deal, but on paper that is one of the silliest positions for these worlds to be placed and taken by the CC. Now again, not ever wanting the TC to copy others, but this situation is a bit absurdly advantageous LOOKING for the TC.