We saw it before. The TIE phantom was a beatable ship but it killed everything that preyed on Fat Turrets.
There was no reason for the Phantom being messed with. I mean how many tournaments did they win?
It was errated for being meta warping rather than an unstoppable wrecking ball: it had hard counters in the form of high PS PWTs but it drove just about everything else off, hence it was dealt with.
The errata was good regardless of that though: the mechanic is much more strongly thematic in its current form. The TIE phantom is somewhere rather than its previous state of being a Schrodinger's Phantom that's always in the worst possible position. It's now the only non-reactive arc dodging ship in the game and is more unique for it.