Hi,
With some music program (for example, Dorico) there is no easy way to transfer, say, CC1 messages to CC2. This has proven a problem when trying to use an existing project (using the standard CC1 controls for dynamics) with your Synchronized SE libraries, programmed to use CC2 for this task.
To adapt the old project to the new libraries I would have had to either rewrite all the dynamics automation, or to reprogram the presets and the expression maps. A huge work. Exchanging data with a more capable sequencer was not in question, since I would have lost all the notation data.
A handy feature would be a CC routing in your players. Receive CC1, and route it to CC2. The user will be in charge of checking for overlapping CCs.
Paolo