i dont know anyone that left 40k because it got "nuked back to basic" - in fact, it got an outburst in popularity now that its not literally 60 pages of universal rules you gotta remember.
The bigger issue with xwing 2.0 is its a card/cardboard based system. Unless they abandon that, which i doubt they'd do since the card upgrade system is where a lot of their money comes from (how many people bought multiple G4H and do NOT use vipers/kfighters at all?), the only way they could release a 2.0 is if they also released updated cards/cardboards for EVERYTHING and theres no way they could do that that wouldnt end up A) being an absolutely abysmal money sink on their end for little potential gain or B) pissing everyone off because they gotta rebuy all the cards/cardboards. No matter how you deploy it, either FFG is taking a massive hit financially to just give out new cards/cardboards or players are basically buying the game from scratch again.