Plus, growing more but smaller plants is less stressful (and likely less work too), Besides no longer worrying about when/if your plants are going to grow BIG (see that often on AFN), smaller plants are not as needy and finicky as big ones. Smaller plants of different strains should all be better able to grow using the same nutes mixture, while Big plants likely each need more customization. And smaller plants suck much less nutes, such as I usually see ≤1 Liter/day.
If you do shift to growing smaller plants, keep in mind that the low(er) light dosage regimens you've adopted may not be relevant at all. Low light may well work with Big plants covering a big area, but with smaller plants, I presume it much better to blast them with maximal light/PAR. Your frequent recommendation of 1 AutoCOB/plant (jammed in a tent filled with non-Big plants, with lots of light overlap) should do the job.