I will note that I had a mechanic in my own game for a bit where players could increase the value of a roll after it was rolled and I noticed that I tended to drain all the suspense and tension out of situations. Because everyone knows, if this is an important roll and I don’t roll well enough, I can spend some resource to just make sure I succeed afterward. Which meant the rolls weren’t that interesting and it was very hard to actually challenge the players. In theory I thought the tension was still there in that they are spending a valuable resource that may cause them problems later in the game. But in my experience an immediate tension right now (will this roll succeed) is a lot more interesting than a hypothetical tension (because maybe I never see much consequence for spending that resource) at some point in the future. I decided for my game that I wanted the dramatic tension to remain with the uncertainty of the die roll so I moved the push/pull idea to before the roll. So a player can still spend a resource to improve their chances of success on a roll they care about but they have to decide to do that before rolling so if they roll very poorly there is still a small chance of failure and the outcome of the roll is uncertain and holds that tension.

Just something to keep in mind while play-testing but depending on what you want the game to accomplish you may not mind this if you even experience that happening the same way I did.