I think your assessment is right on the money. You have a pretty good offense, but not much in the way of speed. Your SPs are pretty solid, but you need some work in the bullpen.
Willis is obviously unlikely to win 22 games again this year, but he should be pretty solid. I'd expect his rate statistics to be down a little from last year, but still very good.
Take a look at my team if you have time: http://www.fantasybaseballcafe.com/foru ... p?t=174041