Any program that works with images lets the user change the image a bit. Picasa did that very well, Irfanview also has some very good tools. There is no reason why Monument doesn't also.
The alternative is to do all the photo editing somewhere else, and only them upload them to Monument - and that makes Monument not worth the time and effort.
Simple tools needed:
change picture details (name, date, time in the metadata)
Manually choose faces
Eliminate faces when Monument incorrectly finds a face
Those features, along with all the other features requested, would go a long way to make Monument worth having. It isn't yet.