I'd happily give them years of radio silence if it meant they'd just axe the current engine, rip out the teetering tower that is the 1.0 code, and just recode/redo the engine from the ground up. If it means we can finally get all the QoL, Graphics, UI, and systems improvements we've been clamoring for, by all means take as long as you need. Anything to stop hearing excuses about why things are limited and broken.

Hell, make that a new expansion: FFXIV: A Realm Rejoined.