The Init string in the expression maps is very useful to reset selected CCs to the indicated value.
This can sometimes not be enough. For example, you may want to start all the CC11 values to 110, but they will then change during the piece to follow volume changes.
Something very useful would, therefore, be a command to insert those init values as real values in the Play ‘track’. Selected ones would be better, but all would be fine.
I’m personally spending a lot of time inserting CC7, CC11, CC73 and CC72 values at the beginning of each track, knowing that I will make heavy use of them, and letting the expression map reset them in the middle of a piece give unexpected results.