The problem of selling season tickets, IMO has never been that the price was too high, because frankly the tickets are quite reasonably priced. The bigger problems are: 1) The team hasn't been exciting to watch because of a) poor talent/coaching/on the floor performance and b) poor schedule; 2) people just have a hard time coming into town to see games -- especially on weeknights; and 3) most casual fans aren't interested in having tickets for or going to 15 + games.
If students who live right on campus have a hard time getting to games that they can walk over and see for free - then the reality is that people will generally have a harder time racing home from work and getting back in the car and heading into DC with traffic and parking issues to go to games.