I only go there for the weekly Ordos and Celestial kills.
Dungeons and Dailys are boring as hell after the 3rd run, TI never gets boring.
I only go to the island on tuesdays for Ordos. Blizzard recently mentioned there may be enough time for a second PVP season before WoD and that tells me we are stuck with Mindless Isle for much longer than we were expecting. Then we get the joy of an entire continent full of Mindless Isle 'content'.
Because 'rares' that spawn every 30 minutes and mario jumping from columns is apparently engadging content to someone.
Timeless Isle proves that if given the opportunity players will burn themselves out grinding if there isn't a cap.
Dailies is essentially the same thing as Timeless Isle but with a cap on how much you can do.
They are both basically the same thing, just presented in a different way. If you don't go completely hard into Timeless Isle with the mindset of having to do everything all at once, it probably has a longer shelf life. That's my opinion anyways, I personally don't like dailies as a rule.
Ultimately they said they will probably do Timeless Isle but with a bit more scripted approach, much like the 5.1 dailies. The 5.1 dailies IMO were probably the pinnacle of daily content. Not too much and really impressive story elements happening in bits spanned over several weeks. I never felt overwhelmed with the 5.1 dailies like I did at the launch of this game with golden lotus, klaxxi, and shado-pan.
Same with "daily heroics" for instance.
After Golden Lotus I miss no dailies. Wouldn't mind if they added a few more dailies on Timeless Isle, but not to the craziness that was GL.