Interesting information that I will parse for the future and keep it all in mind as I continue the gameplay side of the development. That's a bit out into the future so I am grateful for the thoughts.
But, I will note this: There is a heal spot right before the end because the gameplay balance arc is incomplete in this. I was aware of that and added that specifically for that reason. If you see this, I hope you can experience the ending as you expressed a desire to via that. You shouldn't need any of the upgrades to do so, to note, as I balanced it with that in mind.