@OP (cus I skipped the preceding three pages of replies, sry sry not rly sry):
Your argument is based solely on the fact that the Major Explosion exists in the new damage deck. That card affects all ships. It is now easier to one-shot A-Wings, TIE Phantoms, TIE/x1's, TIE/ln's, TIE/fo's, B-Wings, and ANYTHING ELSE with three or fewer Hull.
In fact, it's actually HARDER* to one-shot the X-Wing than any of those other ships because of Integrated Astro, with which it would be impossible to one-shot Wedge in the scenario you devised. Major Explosion therefore makes the X-Wing MORE powerful than it was before in comparison to the aforementioned ships. Thus, the only way your argument works is if you ignore the X-Wing fix, in which case it essentially boils down to "the pre-Wave 8 X-Wing is underpowered," and that's not exactly breaking news.
*Assuming a situation like the one raised in the OP, in which the attacker gets the required 1 crit through shields.
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