Has it occurred to anyone that if you want Berzerkers on Juggernaughts or Plague Marines on Palanquins or units of Aspiring Sorcerors on Discs, you can do that? GW has always said "make your own rules". In 6th edition, that message hasn't changed but is being pushed harder (well, they might have added "because we sure as hell can't" to the end). Sure, if you want to go to a tournament they won't let you, but not that many people go to tournaments. Any half-reasonable group of friends should let you run these things, because hey, it's cool, and this is a game of toy soldiers...
Once you start seeing the game this way and altering your approach to it, you enjoy it so much more:
What I mean by that is that I think some people (myself included in the past) want GW to spoon feed them supplements to make up for the lack of balance (especially compared to other systems) and make their favourite army better...Well, that aint happening, because it just isn't the kind of game that focuses on balance, it's much more about the background, creating storylines (or narratives) and being creative with scenarios, homebrewing etc. GW have made this abundantly clear. It's a beer and pretzels game, embrace it as such and have a good time.
Fact is, 40k does what it is meant to do incredibly well. Hats off to GW for that. If you want a game that focuses on the gaming side with rigorously play tested and balanced rules and units, you are better off with something like Infinity or Mali. But the trade off there is that the fluff is pretty piss poor compared to 40k. There are no real 'themed' armies and very little diversity in terms of themed lists and what you can do in terms of conversions and modelling...40k in comparison has a crazy amount of diversity now with the break neck speed of supplement and codex releases, and that is rather awesome in it's own way. And it allows greater creativity in terms of painting and modelling IMO.
And honestly, who even plays this game competitively anymore? It's got to be quite a small minority...