PHOTO: Jalon Calhoun (5) at Virginia. By TOM SHANAHAN College football always has been hard to predict. Outside of No. 1-ranked Clemson and No. 2 Alabama attracting 5-star recruits like lemmings to tip the talent scales, it’s easy to overestimate or underestimate teams. And that’s in a normal season, without a COVID-19 pandemic. All routines – football coaches, like generals, love regimentation -- have been altered. It started with teams missing all or most of spring football. That’s…