A lot of the casual (recreational?) skiers I know from the NYC metro area ski less than 7 days. It's more of a "something to do" once or twice a winter, rather than a sport or even a hobby.
Apart from the "bus people", I don't know of anyone who regularly skis Hunter as a day trip. (But I do know a bunch who have season passes there. Those are the ones I heard the biggest grumble from, fearing an increase of pass price next year)
All the people I know who are "regulars" to Mt Snow, Okemo, Stratton are season pass holders. (They'll automatically benefit with a lower priced season pass without changing anything at all.)
The rest, mountain hop all over. Sometime taking whatever deals they happen to find.
Will the Epic's 7 day break-even be a good enough draw? I don't know.
Once we start talking about southern VT, Killington comes into the picture. Ikon has that one locked. It's a deterrent for many of the wannabe "expert skiers" to not have it. Epic has an uphill battle to convince those who can ski "for free" in 2 big mountains of southern/central VT, but not including Killington.One can debate the pluses and minuses of the resorts that are part of Vail Resorts for sure, however for a significant chunk of the masses who make up most of the crowds on a hill day in and day out, the value that having a pass, with the number of options as the Epic pass (or IKON as well) at the price points they're offered at, certainly has a great deal of appeal to plenty of customers
Ikon, in the mean time, has Stratton and Killington. That's a better attraction for many of the casual skiers from down here. While Hunter and Mt Snow have some legit advanced terrain, it just doesn't have the cache as Killington.
(this is my year for Epic, so the addition of Hunter will be a welcomed one. But it isn't important enough to change my pattern of rotating passes year to year)