As Thayos already pointed out, you've completely missed the point. Again. We're not talking about casual content.
We're talking about challenging end game content other than Savage raiding. Even WoW is adding things like world events, Mythic+ dungeons in 7.0 and the large scale dungeon with the revamped Karazahn in 7.1. FFXI had a ton of endgame content that was nothing like Savage raiding, plenty of which could be adapted into content for XIV.
If you honestly believe that adding things like mounts, titles, and glamours to raiding would do more for sub retention than increasing the variety of challenging end game content, you're either delusional or hilariously out of touch.