I think it's because he's a forward only, if F/M like Greene there would be a lot more interest.
I don't think a team should be picked on multi-position eligibility. Pick a team based on scoring potential, and if the guys you choose are multi-position eligible than that's a bonus. For example, I'd pick Smith as a forward keeper, if he was midfield eligible it would add nothing to my team, as he'll sit in my forward line all season.
For the record, I'm also keeping an eye on Greene. Problem with him is that he generally needs close to/more than 30 touches to ton up, whereas Smith has no issues doing it with low-mid 20 touches.





