While I'm not as sold on the new TIEs (seem expensive for Sloops, a shield, and a couple more greens), the new X-Wing is going to be a beast.
- An extra shield, plus native Boost for repositioning and Autothrusters access.
- A PS4 generic with an EPT.
- An entirely new maneuver, which minimizes the opponent's ability to block it compared to the single 4K, plus a hair of green.
However, they're also 3 points more expensive than the old T65s, so they're not going to completely knock that ship or the B-Wing out of the game. You're generally not going to fit a squad of 4 into a list and expect it to do great. Older pilots like Biggs and Wedge can probably still show some of the new flyboys some tricks, and Wes can probably ruin Poe's day. There will still be a spot for the old craft.
BB-8 also helps the T65 X-Wing out a lot. For two points, he gives you a free barrel roll action when you reveal your dial. As it's a free action, you can pair that with PTL to focus or TL, then execute your green, clear the stress, and take a third action. He locks you out of R2D2 or any other astromechs, and cannot be used when stressed or after revealing a white maneuver, but he's still going to be a great option for the older craft for only two points.