Not entirely sure this is implemented in tape your modeling but a pilot should be able to return to the previous frequency he was on, for example by pressing COM1-ENTER on the ICP.
Implementing this would facilitate better/quicker channel hopping when you can anticipate what the next channel is that you're going to be on, effectively cocking the next frequency you're going to be on.
Granted its quick and easy when it's just a single digit channel number, but saves some seconds when its manual frequencies.
Example;
You're on Channel 1 and you know that following line up, you're going to be checking in on 250.10 ( departure for example ) then after that you're pushing strike on channel 5.
So being the good wingman - anticipating this, you press COM1-2510-Enter, then quickly again COM1-enter ( back on channel 2 ).
You line up on the runway, hear lead say "push 250.10" - all you have to do is press COM1-enter...