Comm Relay is not shield regen. There is a HUGE difference between avoidance and regen.
In most cases, there's almost no practical difference between having an evade token you can spend an action to get back and keep forever, and having a shield you can spend an action to regenerate.
Because in the vast majority of cases, spending an evade token and losing a shield have exactly the same practical effect.
That's not to say that there are no edge cases where it's different, but in the majority of cases, it's functionally the same.
Edited by thespaceinvader