Unfortunately, we have no numbers to back up any decision-making speculation either. Nobody truly knows the cost of seasonal events, normal operating days, or season pass revenue. Heck, Cedar Fair stopped releasing yearly attendance numbers by park years ago, and unlike the last few years, KD didn't even release their top ride numbers for the season!
There have been rumors all over the place from Winterfest being a huge loss for the park every year, to it being profitable, just not as profitable as they had hoped. At this point, part of me hopes it had just been a loss for years now but still managed to hold it anyway. I know the cost-savings won't go back to the park (just the pockets of Six Flags investors), but perhaps they can invest the money elsewhere. I've been happy with the last few years of retracking Grizzly and Racer, and for food upgrades, but maybe we'll see some investments that actually bring a few people to the park (even if they are small). At this point, a new flat ride, or two, or three is really what the park could use. Hopefully the new shows this season will show it's marketability and they can continue to feature live entertainment for years to come, and maybe even bring back Let's Get Wild.
Tricks and Treats and Oktoberfest seemed really successful last year, and don't seem to have a need for much upgrade, so hopefully a loss of Winterfest could spark a few upgrades to Haunt, at the very least. Build a small airplane hanger behind Reptilian for a new Haunt maze and build an entrance queue between Rapterra and Reptilian (on the outside of the dive loop) and you can have a brand new Jungle/Temple themed Haunt maze to tie into Rapterra and Jungle X. Ghost in the Machine/Iron Menace worked really well together for Dorney.