1) Graphics. Graphics is what makes me endure the daily routine of doing the same two dungeons over and over, the same scripted fights over and over. If FFXIV had the graphics style of say WOW, I'd probably not even payed a cent after beta.
2) Witcher 3. There are a lot of things a single player game offers that MMOs will never ever be able to offer due to the inherent difference in their business models. I would suggest every MMO player to play a single player game once per year at least to remind themselves what gaming really should be.