The problem to get houses now

[Madbunny]

Thanks to building this game on the bones of 1.0 the code is apparently a mess

They said 2.0 was built as new game and not just upgraded version 1.0. So if SE claims that the code is a mess means they didnt learn anything from the original game:

The original Final Fantasy XIV released in September 2010 to largely negative reception. As a result, then-Square Enix President Yoichi Wada announced that a new team, led by Yoshida, would take over and attempt to fix the issues with it. This team was responsible for generating content for the original version as well as developing a brand new game which would address all of the previous release's criticisms. Initially dubbed "Version 2.0", it features a new game engine, improved server infrastructure, and revamped gameplay, interface, and story, fully replacing the original.

[Jojoya]

They said 2.0 was built as new game and not just upgraded version 1.0. So if SE claims that the code is a mess means they didnt learn anything from the original game:

I would take some of the things said in your quote as tentative from the way it's stated. It sounds more like a statement of what SE hoped to achieve when they announced the revision to the game as opposed to being an after the fact statement of what did happen.

We know now ARR was still built in large part on the 1.0 game engine plus consideration for promises for PS3 support that limited what they would be able to do at the time. They had to use much of the original in order to get it released quickly. There are extensive histories on the development of ARR all over the place.

They learned a lot from the original game. Ask anyone who played both. But it doesn't mean that they got everything right the second time around. They continue to make improvements to the game, especially now that PS3 and 32 bit support is gone.