I think what you have here is part of the joy of moving to the MS Office Ribbon type windows UI methodology for compatibility with new and future MS office products. There are some constraints that may prove difficult to code around. Sometimes the constraints are technical. Sometimes they are a requirement for the all important product compatibility authorisation.
It never hurts to make suggestions for improvements though. This forum is, mostly, a user to user forum and as such is only partly "official" for providing suggestions. Creating a formal support case could be a better way to bring attention to your concerns. Either that or add the suggestion to the Future Features for Monarch thread. Perhaps both!
From you description I take it that you need to edit your model(s) on a regular basis to make them useful for a current fiscal period. Is that correct?
An alternative approach might be to seek to make the models dynamic so that automatically adjust according to the months being reported.
If that sounds useful post back and I will seek out past discussions and other information that might help you move in that direction.