Really tired of this ignorant response.
First of all, XI is no longer the game it once was - that all went out the window with Abyssea & the level cap increases, though even then it wasn't until Seekers (specifically Delve and the introduction of tiered gear) that people finally left the game in droves. Secondly, XI's UI and combat SUCK compared to XIV's, along with quite a few other aspects like crafting and gathering.
What we (XI fans) wanted was a game that expanded upon what XI built with a better UI and flow of combat. What we got is a broken job system that doesn't allow for any meaningful customization, largely easy-mode content and leveling and worst of all no real sense of immersion or attachment to the world. XI really pushed hard to suck you in with its quests, story, music.. hell everything. The amount of lore in XI is mind boggling, and the expansions had some of the best writing since FF6 (in some cases better, such as CoP). Speaking of CoP, that expansion was brutally hard and it was great being rewarded with more story after each segment (the running around the world and back again, not so much lol).
Now in all fairness, I do think XI all too often took things to the extreme in terms of time sinks and difficulty. However XIV has gone completely in the opposite direction with a largely throwaway cast and plot to boot. Granted, the original 30 nation missions weren't mind blowing either but they were still more intriguing than the generic mess we got out of ARR. I expected a lot more out of the writer of FF12 given the mature, political tone that game took.
@ Dano: Yeah certain skills were pretty strong but the original intent was to use the classes as a base template and create your own. Besides, that's what balancing is for. The original armory system was probably as close to an FF5/FFT style system as we've ever gotten and I miss that aspect of it, however I'd still prefer just a straight up traditional job system akin to XI's (minus all the stupid skill rankings - it was enough that you'd only gain spells and abilities up to half your main job's level without their effectiveness also taking a massive hit if your main didn't have the relative skill rankings natively - another great thing SCH fixed ^^ )