I hope the crystal tower will be an actual landmark and not some lame Aetherite or a NPC that just teleports you into it. . . Toto-Rak and Darkhold did it borderline well enough I suppose. They're both actual dungeons to which you have to travel and then register for entering at the NPC. I said 'borderline' because they don't stand out at all in the world from any other generic hole in the ground >.> (adding some runes or whatever carved into the rock on the outside, a stone arch, torch holders. . . . whatever! would make them more interesting when you happen to stumble upon them, imo).

In that regard, I hope they add an actual tower, and not a boring old Aerherite (Ifrit) or a NPC (Moogle) to access the content. Granted, those two aren't raids but never the less it's a boring/lame way to enter the arena >.> WTB inaccessible Ifrit pit that I can at least see from a ledge below me or something. . . .