square enix repeting the same mistakes as WOW?

[Ardyvald]

They do QA and let's say find a bug that take longer to fix.or even more bad don't and it be at day 1. What then. I don't say it to hate on no one here.

I'm pretty sure they stated during PLL that it has more to do with fine tuning than just "checking if the engine is going to break", so to speak.
It's more about "checking that everything is covered in terms of lore to wrap things up entirely".
That also might be the reason for 2 weeks : over these 2 weeks, you'd have roughly (not in one go but split into severals hour-session) 1.5 week to check everything up top to bottom, 0.5 week to cover fixes.
Maybe, we don't really know the extent of what needs to be dealt with (except the big picture)