They should delay it. They’ve already made a remaster, if they mess it up they can’t make another remake after a remake after a remaster, they only have one shot to do this right. And Ragnarök comes out two months later anyway. No need to rush this out without implementing what fans were expecting.
There's nothing that can be solved here by a delay.
It's not a lack a polish, first of all people are just assuming that what they're seeing in a couple of videos leaked from who knows which build is the full story when it's probably not, second based on these leaks they're asking for this remake to be a project with a much bigger scope (full redesign with new gameplay mechanics and whole levels fully adapted to take advantage of these new mechanics otherwise the new mechanics per se are pointless or could actually break the whole game giving advantages that shouldn't be there).
This is in hindsight even more hilarious, this project is both the remake no one asked for but at the same time people are asking for a much bigger scope and development time spent on it
The situation is pretty simple and doesn't even deserve these storms in a cup, just wait until you hear the full story from ND, if you like it you buy it, if not just play something else or wait until this is added to PS+ Extra next year.
Personally I won't buy it regardless of the gameplay improvements because it's a game I fully remember and has no surprises left for me, I would just drag myself through it.