Comparing an offline FPS to an mmo is weird. Of course you won't mind mechanics being the same. They release in yearly installments. New worlds, new missions, and the online play is free in most cases. While you may have a lot of fun even though the fps are rather identical. Those games may give exponential short burst replayabliility. But in most cases you will not be playing the exact same fps entry for 5,8,or even 10 years. Also fps are not known to try to immerse you in giant worlds with 1-10k hrs+ replayability, and lore. Project titan is looking to change that, but that's in the future.
FFXIV will recover faster if they take the easy route and copy pasta systems from wow or ffxi. But imo if they don't try and keep some sandbox elements or originality. The games maximum potential will never be reached. Which has been proven time and time again with clones. If you liked Lineage 2 minus mob grind, Tera will bring a free targeting system, quest leveling, and a sandbox poiltical endgame to wet your whistle. If you seek a game with some of the best pvp known, dynamic events, and hot interchangable skill bars play guild wars 2. FFXIV is still my number one choice, as long as they don't delve too much into cloning. Oopsies forgot TOR. TOR is going to be fine. Wow polish with Bioware storytelling= win. But if you want mandatory or high grouping encouragement during the leveling process. It may not be for you. And I know this forums opinions on grouping requirements thus far.