Threepio isn't reusable if you max your score (presumably by accident). And he's not reusable if he's killed. This is normal Threepio behaviour -- not just in squad battles, but in past raids. He's acted like this in EVERY raid.
The only reason this is at all coming up as an issue is that with 3 toons squads there's less opportunity for synergies to make another toon more valuable than Threepio is for a given attempt.
In past raids, you could reuse Threepio in all the different squads, but there were only 2 or 3 that he fit into well. In all the other squads, you might as well use someone else since your results would be as good or better and you didn't have to worry. about making sure his escape mechanic triggered.
By revamping everyone's abilities, each toon is less of an individual and more of a generic piece that slots with other generic pieces. Thus Threepio just works with more comps than before. Add that to the fact that my Threepio is r8 and suddenly I can use him with anyone.
The problem if there is one is not that Threepio escapes. It's that he works so well with Dark Side characters.
If there's a nerf to be made, I would disable Threepio's escape mechanic at the beginning of an attempt if any DS toons are present or otherwise change Threepio's abilities so he is not an asset to DS allies.
But let's be honest, Threepio's entire escape mechanic, the whole idea of him being with one group then they're all gone and suddenly he can escape and join another group, THAT WHOLE THING is inspired by Endor, where he gradually got separated from the other rebels, then yelled, "Over here!" and the Imps captured him.
Then what happened? Ewoks appeared by the hundreds and Threepio escaped to be part of a different faction.
To say that Endor is the one place where Threepio can't use his escape mechanic would be a literal travesty.
