Its a one sided poll. I would not buy any because FF bodies are the up and coming thing. I've nothing against APS-C, I own one, but EF lenses work fine on them and can be used on my FF body as well.
I don't really believe that crop sensors will ever go away now - the benefits are for too great for the manufacturers in the mass market - however here in lays the problem, the vast majority of crop camera owners will never own more than two lenses, many of these will stick with just the one "super zoom". However, looking at the options, the EOS-M 22mm f2.0 is nearly a third of the depth and weight of the full frame 35mm f2.0 (ok so this has IS) - so I feel that there is an opportunity to provide a small range of crop specific primes, which a widened range of FF pancakes wouldn't necessarily forfill.
Similarly with the crop zooms, the 15-85mm is a cracking lens, but crop users need more like it, the 17-55mm is getting old, it could be improved in a number of ways, there isn't a decent crop specific zoom to match the 70-200mm range (something like a 40-135mm f2.8 would be nice) - the 70-200mm f2.8 IS II just looks silly on a 700D, but as a starting camera, more serious users are likely to grab an extra lens or two and the 70-200 range is popular.
I'd love to know the breakdown of lens sales to users, whilst we speculate, I really do think that the crop user is underestimated by the minority FF buyer, especially in the UK where I live, you hardly ever see FF cameras other than in the hands of wedding photographers and even then it's just as likely to be a crop body.