Very interesting indeed!Supposedly the new engine is just a visual engine that runs on the old game in the background.
All of the mechanics and everything is based on the background original game's 25 fps and grid system while the visual engine is capable of high frame display.
Watched that deep dive 40+ mins video where they explained it.
They mentioned that it wasn't easy but the game should basically behave as the original game and they also did not touch character balance or anything.
Theres auto gold pickup 'optional' and shared stash between your chars.
Ima watch this tonight. Seems promising. Tony Hawk 1+2 and Crash Bandicoot were perfect remake in my opinion.