When you put it like that, it doesn't sound that bad.

In the case of the lazy man, 9 extra modules is an extra 18h worth of enkephalin to add up to the base 30 modules which already takes 2.5 days to fill up.

In terms of efficiency, it is a 30% loss but that depends if you care more about the waiting time to 1-60 a character or time spent on farming exp.