I think it really comes down to whether you like the gameplay or not. I joined FFXIV back when everyone seemed to be running Coils, but before WoD released. While others were getting frustrated with Coils progress, happiness was the only emotion I felt whenever I thought about the amount of content ahead of me. That's because I was thoroughly enjoying what I was playing through, and so having a plethora of it left to consume was bliss.
The great thing about FFXIV is that all the enjoyable content isn't hidden away at the end, not unless you're only interested in a very specific part of the game. Being in expansion A is just as good as being in expansion B or C. Unless they just don't care about the MSQ, anyone who is skipping through most of the content just to play an upcoming expansion has really done themselves a disservice. It's like throwing out 80% of a fresh pizza so you could focus on enjoying the remaining slices - it was all the same pizza.. why would you do that?