The Y-Wing is VERY close to being 1/72 ( I compared it to my Fine Molds). It's a shame they didn't mold some of the details as seperate pieces, because some of the simplified pipework just looks plain awful! However, I think a lot of these kits get an unfair rap. Look at some of the horrors released by AMT over the years. With a bit of hard work and a good paint job, there have been some amazing builds made from them. Proof that in some instances, you CAN polish a turd. I guess these snap kits are aimed at the younger modeler who isn't too fussed about accuracy or scale. An experienced modeler could probably knock out a pretty decent looking bird with one of these Y-Kits. I know for me it's cheaper to cut up one of these then it is to do the same to a FM kit!
The X-Wing looks to be a bit bigger in scale though (Maybe 1/60 ish??) but I am basing that observation on the size of the pilot that comes with it.
I know the pocket snow speeders are amazing little kits for the price, with pretty decent looking pilots and nice crisp parts. I'd say they are almost in scale with the AT-AT (but don't quote me on that. I'm just basing that on what I see on screen) I have a load of them, planned for a Hoth battle diorama).
I guess it all depends on how much work and time you are prepared to put into a model. If you want high accuracy right from the get go, then maybe wait for future FM releases. But if you want a project to really get your teeth stuck into, then I would certainly recommend picking up a few. Re detailing the simplified parts on model kits is half the fun of the build isn't it? I have had all of these kits and I have had no problem with fit, no warpage, minimal flash on what are usually crisp molded parts and the prepainting is pretty good, especially around any canopy/glass frames.