I don't believe so.
I think that raiding is considered the end game for warcraft right now with the design they set in place with the looking for raid.
I believe that is why the looking for raid was created in the first place, to train us that raiding is end game for everyone and not just something for the elite like some people like to think it is. A decent amount of the wow player base sees raiding as something that only the good players should be allowed to do.
It was created with the idea that everyone should be able to raid because the end game is raiding and who buys a game with no intention of seeing the end game?
I personally consider looking for raid optional content in the same way I consider heroic raiding optional content. The normal raid, to me at least, is end game. I can choose to do LFR to gear up some characters quicker or to make for a quicker valor grind. I can choose to do heroic raids if there are people on that are capable of doing it. Both are choices, things I can do but do not feel I need to. Yes, I like to do them both, sure, but neither of them are required for me to enjoy the game in my opinion.
By firmly placing my opinion of end game in normals I leave myself in the perfect position to enjoy the game. I can do looking for raid on all my characters so all of them can see the content and I can complete the game as intended in the normal raid and on the characters I excel on I can attempt the challenges that heroic modes might offer me.
If a raid tier is designed too easy I will drag more characters into the heroics. If a raid tier is designed too hard I can still at least see everything in the looking for raid if I run into problems.
Being stuck in the middle in the game right now is the perfect place to be. No matter the difficulty level of the content I can enjoy my game play. Maybe one character gets to heroics, a few might farm normals and everyone else can see everything in LFR.
But this is not about me. I am but one person, there are many others out there and while it seems, to me at least, like this three version approach to raiding gives me something for all my characters to do, for some it still leaves them out in the cold.
I will not go as far as to call them bad players but there are still some players that are not ready for raiding. There are some players that can not contribute enough in the looking for raid version. So for them, even that is too hard. There are also some people that just do not group with random people for what ever reason.
What is there for them out there?
Perhaps they know they are not ready for raiding, even at the looking for raid skill level. Perhaps they are intent on just playing the game for fun, for role play purposes, for questing, for PvPing, for whatever it may be.
What is there for them really?
Dailies? Once done they are done, once you get what you want from them there is no reason to keep doing them. That is not consistent content.
Reputation grinds? Once you get exalted you are done and with the tabard system now getting exalted takes no effort.
PvP? It is not designed content, it is player created content. You can fight anywhere at any time with any one in any numbers. The people can make PvP better, there is not a great deal that designing content for it can do. 1 battleground or 100 battlegrounds won't make a difference. It is still just fighting.
Gold making? There are many ways to make gold but once you got your niche down it is all repetitive and sooner or later you are left to think, what the hell is there to spend all that gold on anyway?
Raids have more playability in my opinion. Even if you have done a raid a dozen times it can still be different when done with different people or as a different class or in a different role.
Doing the molten front dailies on my hunter was fine. Doing them on another character seemed like repetitive bullshit that was not worth the effort.
Finishing a raid on my hunter was fine, but so was finishing it on my shaman and my warrior and my druid and my priest and... you get the idea. Repeat raiding is more satisfying than doing grinds for no reason other than grinding them for something to do.
They need to find a way to make non raiding content that is actually worth doing on more then one character. Grinding out something for the first time is fun for some people, I like it, but grinding it out a second time when there really is no reason to do it is not something that anyone would find particularly enjoyable.
So without raiding what is there?
Can a non-raiding end game exist?