Meh, been playing 4 years, still enjoying it just as much but in different ways. Other mmorpgs have come and gone on my comp, but they all get uninstalled (some after just one login) whilst WoW only gets uninstalled when I do maintenance/upgrade. I'm 27-years old at that, so it's not exactly a "growing up"-thing.
And the dailies = makes it feel like I've earned it when I reach exalted. I disliked them to begin with, but then I took a step back from the "It's there so I have to do it!"-mentality and simply decided which factions I'd like to get exalted with.
If bored, stop playing. Not sure why it's such a huge deal to some people to tell everyone that they're bored with a game that they've been playing for a long time. Also, you're obviously not right with every claim in your post but each to his own.
For the dailies Golden Lotus are definitely a Sha in disguise. I think i've never hated something in video game more than those fucking dailys and definitely the worst part was that the other dailys were gated behind this faction. Also the whole expansion just feels it's a big filler, MoP is a expansion pretty much because they were forced to release expansion because of all this activision-blizz stock market bullshit.
I have to admit I enjoy the dailies and more importantly I have enjoyed the 85-90 leveling experience. There are so many quests I have not done, and zones I have barely spent any time in. I have lots of toons to level and while I might be leveling the "fastest" way I am getting an opportunity to try out new things and have a good time doing it. I have hit exalted on Golden Lotus rep for my main and I keep hearing people complain about them, but it was not bad. I can complete all the dailies in 15-30 minutes (got faster as I got more gear). It really does not take long. They give decent amounts of gold, I found some of them enjoyable (I particularly liked the ones in the town that was constantly being lit on fire) and were not that time consuming to do.
The key thing to remember is that it is a game. If you don't enjoy it, take a break. Maybe you will come back, maybe you won't. Just do what makes you happy. Whether that is playing WoW, playing another game, or stopping playing video games altogether. Your time is too valuable to waste on something you don't enjoy. For example if you don't enjoy dailies, don't do them. There is no need to do them. Honestly MoP is the first time I ever spent any effort on dailies and it is because for the first time, I have had fun doing dailies. Many people disagree. It is okay. Just make sure that you don't regret how you spent your time.