its fine to have own opinions, but this idea very clearly goes against the basics of a roguelike. your example for slay the spire literally helped show this point: you start the run and slowly make your deck, then at some point, you need to do something that either rewards or punishes you, but your own deck and decisions leading up to that point have nothing to do with it? makes little sense.
again, im not saying it cant be a nice addition persay, but it will need a lot of thought behind it. youre the dev afterall :)
why did you stop posting on reddit?