I don't agree that there aren't steep runs at SR. However, there aren't any that are loooooong and steep. SR is a series of small peaks, one of which claims to be over 2k in vertical height (not sure how true that really is). As a result, you do a lot of traversing back and forth across the peaks. With that said, I really enjoy skiing SR. There is a good variety of terrain, much of which is extremely challenging (check out Whitecap, Aurora and Oz peaks on Youtube to get a flavor for some of the more challenging skiing). There are some very long blue square runs off of Jordan Bowl that you might enjoy. I also enjoy skiing it early season b/c they blow snow like crazy and get a bunch of terrain open really early (see Killington as well).
If you're coming in January though, I'd tell you to ski the Loaf or check out Saddleback (qcanoe is the Epic ambassador there and has written some great articles about it). Again, SR is a fun mountain but if you're looking for loooooooong and steep, you'd be better served at the Loaf. If glades are your thing, check out Saddleback. When there's lots of snow mid-season there are better options available than SR; although I will say that I still ski SR a LOT during mid-season b/c it's so much closer to me than the Loaf or Saddleback. I usually hit Saddleback a lot beginning in March and I'm not very familiar with Saddleback beyond it's reputation (though I plan on becoming more familiar with it this year).
Hope this helps and give a shout out to the board when you're coming.