Agreed. 14 seems to miss out on a few too many prospects, and also has a bit too much fuzziness in the projections. But going 14/14 or 16/16 means you're locking up around 30 million in the amateur draft, which is why so many owners go 20/0 and use the extra 10 mil plus elsewhere.
I have 20/0 College for one of my teams and 20/0 HS for the other. When I draft college, I see over 400 projected prospects. Because they're older they come out with higher currents, which means my minor league teams perform a little better on average, but that's because of more mid-level minor league players. (My crap pitchers are less crap than the younger crap pitchers.) College players should also be ready for the majors sooner. If a prospect is blocked on that team, he doesn't get to the majors till 25 or 26.
On my 20 mil HS team I see less than 300 projected prospects. Because of this, depending on the quality of the draft, my mid-round selections tend to have more "misses" because I'm often drafting players in rounds 8-15 who might never even be good enough for AAA, and I get a bunch of lottery tickets ("Unknown he wasn't scouted well enough") at the end of the draft. Also when you draft HS, you'll have players reaching Rule 5 status at age 22.