"If you're doing music that requires diverse percussive applications
I think it's far beyond plausible... It's down right practical!"
Depends on one's perception of practicality not saying yours has no significance, because it does. But what if 'during' the song you realized the sound of that beater is not appropriate? Who's stopping a moving train at that point? What may have sound appropriate prior to using a particular beater may suddenly project differently when in context of environment, instrumental volume, dynamics, musician mood changes, etc. Those dynamics can be unpredictable and to assume a specific beater gonna cut the job will entail risk factors - not to say, bending downward to remove, then coming upward reaching for another beater, then proceed back down to insert it in it's shaft.
Having said that my friend; there have been times were I was the boss and stopped the music dead center of a tune suggesting to the percussionist, to my immediate right ear, to stop playing a particular cow bell during my drum solo. So I gave him a minute to make some adjustments. So he replaced it with one that was taped and toned down. That's all; just considering moments where stuff has to be changed.
But other than that if you know that you know that a particular beater will work than yes....changing beaters prior to starting a tune is wonderful.
For the suggestion Box: to the engineering department: design a beater holder, likened to a stick bag, where it can be placed front of the BD batter head. This way the time to reinstall a different beater takes half the time. Personally, I will not have sticks lay on top of another drum that's because of my tradition of the stick bag immediate access. Switching sticks vs. bass drum beaters are two different worlds when one considers accessibility and time.
My take on it and not to be argumentative about it. It's really a wonderful concept D and if it works for you then knock yourself out.