I highly respect the implicit decision to forgo repeat purchases by merging into the original game, considering how much work was clearly involved. I haven't played it, but I hope for sustainability's sake, there are sufficient (purely cosmetic) microtransactions to cover their development costs.
He is already talking about the new engine at the end, so maybe that means a new game/version.
Anyway I recently bought it because of multiplayer. Can’t wait to try it out.