Is it me, or do I feel that YT-2400s are basically better than the X-Wing in every way?
Same AS, more health, more speed, Rogue movement, black vs. ships, for 3 points more? I mean, I'd take that over Escort for sure.
I think the problem is that what we were expecting from X-Wing squadrons was a solid jack-of-all-trades durable fighter squadron and what we received was a bit more fighter-oriented and with the extra points tacked on for Escort. If you can't get good use from Escort, X-Wings are very lackluster (which means simply spamming X-Wings, as newer players tend to do, is a horrible idea because then Escort does nothing). In wave one, there weren't a lot of opportunities for X-Wings to shine. A-Wings did the cover all bases shtick better (and faster), Y-Wings didn't really need that much Escorting against fleets with few to no squadrons, and B-Wings could handle themselves nearly as well as X-Wings should they need to fight their way out of something.
Nowadays with Wave 2, I feel that the H6 Scurrg Bomber and Jan Ors have made X-Wings a lot more appealing. The synergy between generic X-Wings and these other two squadrons is strong (The X-Wings Escort Jan, she provides Brace tokens to drastically improve their durability, the H6s love having fighter Escorts and with Grit the X-Wings can quite capably take out engaging enemies to free up H6s to continue on their way). X-Wings are also the most cost-effective Squadron-command-activated means of chipping away at the wave 2 boogeyman, the Fireball (doing 4 blue dice for 13 points, and capable of double activating through Yavaris or Adar Tallon), whereas A-Wings can struggle to do serious damage to enemy squadrons when their Counter 2 gets ignored due to Intel making them Heavy and thus ignorable. Now that you can expect to see enemy squadrons on the table they can also resume the job they were supposed to have in wave one of running interference for Y-Wings (preferably with Jan around to help too).
As a stand-alone jack-of-all-trades squadron, however, the YT-2400 is superior (especially in fleets that don't want to kick out more Squadron commands). If you were one of those players who just wanted to spam X-Wings in wave one, you can now have your wish granted more competitively with the YT-2400. I just don't think it makes the X-Wing obsolete - if anything, the X-Wing in wave 2 is much more viable than it was in wave 1, but we as a community need to see the X-Wing for what it is (an Escort fighter with limited bomber utility) instead of what we wish it was (a jack-of-all-trades squadron), because the YT-2400 beats the pants off of the X-Wing we were wishing for but does not exist.
On a side note, I'm kind of hoping that with the new trilogy coming out FFG will release T-70 X-Wing squadrons that function more like cheaper non-Rogue YT-2400s, so every Rebel who wanted to field mostly X-Wing squadrons can live their dream while remaining competitive.