This speaks more to ESPN's piss poor financial dealings over the past decade or so, when they started over-paying for NFL, NBA, college football, etc., than anything bad about the ACC.
You can only strong arm the cable companies for $8 per subscriber (or whatever it is they get) for so long until those who aren't interested in live sports start ditching cable.
ESPN over-paying for content and on air talent with people cutting the cord is bad news for ESPN. Just a bit of bad luck with timing from the ACC's perspective, but there also might be a silver lining here in that the ACC Network could look different than all the others, which sets up the ACC better over the long term, if the cord cutting trend continues in the cable industry.
Having your own on air network won't look so hot, if that trend continues, in other words.