They did use the same engine for Part 1 so a lot of the tweaks should likely be transferable. But I rather have them take their time for a polished release too. The Part 1 port was a hot mess and took several months to get in an adequate state.
Good question. Having not played the PC port myself, I only know that it was addressed by the studio (and/or publisher?), and that people stopped talking about it after a couple months. I personally concluded that the game must've been fixed to some degree.