Big Sky offers a "Frequent Snow Card" that reduces the lift ticket to the $50 range, and for the unhappy Bozemanite, $80 lift tickets are the norm in the industry. I have skied Summit County and the SLC area and Big Sky has more terrain, more variety, and more "lift accessible" challenging terrain than any of them. You don't have to hike to get crazy steeps off of Lone Peak unlike many resorts that force you to hike for an hour to take a single run in their most challenging areas.
Big Sky-Moonlight offers 5000+ acres and 4000+ vertical feet, the combination of which is unmatched. The night life is almost as lacking at the lift lines. For a resort of this size, Big Sky only receives 300-400k skier visits a year which makes it an untouched jewel. And as for the complaints about the terrain park, the entire resort is a terrain park. Lone Peak has your terrain park. Alta completely removed their terrain park and the thinking is why waste your time at the one of the largest ski resorts in the US by taking run after run in a terrain park. I cannot comment on the quality of the terrain park, but can on the challenge of the mountain. I can ski a terrain park anywhere, but as big as the resort is, there is too much to explore and do for me to even think about the terrain park.