Just finished a game with the new phantom, using Echo, VI, Intelligence Agent, Sensor Jammer and Advanced Cloaking Device.
It's like it's less of a nerf and more of a changed ship. Planning maneuvers is no longer "pick the hard 1 or the two bank and work it out when you do it", you have to plan your entire maneuver then, with your only adjustment being barrel roll (and that as always costs you your action). Where you end up is pretty much defined before dials start flipping up. It's certainly strange planning out a maneuver with two templates.
One thing worth remembering is it still hits just as hard as before. It's still a very good ship, it's just much more of a phantom and less of a Super Interceptor. Intelligence Agent was far less helpful than I anticipated.
The main thing now is that it plays the maneuver game. The phantom's cloak was always "the phantom is in one of these three (or six) positions", except before it was impossible to guess which one as the phantom player could change it. Now you're locked into one decloak and the poker game of guessing maneuvers is very much back: it's possible to guess where it'll go correctly, while before every guess was wrong because the answer changes based on your actions.
My opponent's impression was "it's a hell of a lot less annoying."