Say what? Try skiing Rime at Killington in early November. It's totally bumped up by the afternoon. The way you get early season bumps going is to not groom the trail.
When I skied K early season last year, yes there were bumps on Rime, but minimal decent lines. More like, 2-4 bumps to get some rhythm, then a luge shot to the next bump 30 feet down hill. GS push pile bumps for the most part.
In the East, 9 times out of 10, seeding is going to produce better moguls than leaving a trail ungroomed, unless two conditions exists.
1. A high percentage of good bump skiers on the trail and minimal lower level skiers. Hate to say it, but snowboarding also can be quite damaging to line formation.
2. A good amount of natural snowfall.
IMO, the best natural bumps in the East these days exist at Sugarbush (north especially) and MRG.
People snicker at seeding, but it serves a purpose. It pretty much guarantees a good product provided a ski area is also committed to top dressing the terrain with snowmaking refreshes. For this reason, yes, Sundown skiers have a great thing going for them.