As I've always said, I want an elite SF (and/or SG) - dominant wings are generally the easiest way to a championship.
But there aren't many (4) SFs that shoot better than he does - that's pretty nice when your 4th-6th option can shoot 50% from the floor.
http://www.espn.com/nba/statistics/...dGoalPct/seasontype/2/position/small-forwards
Tell me, what SF are we able to get who would be better than Harkless? We're not getting any of the 4 that shoot better than him. We're not getting Kawhi, Hayward, Barnes or Wiggins. We're not getting George or Butler without giving up CJ. We don't have cap space to sign Gallinari, and even if we did do we want to shell out $10M over what we're paying Harkless to get him? So we're looking at:
Ross (no thanks)
Chandler (no thanks)
Harris
Warren
What would we have to give up to get Harris or Warren? If they could be had for some combo of Crabbe/Turner/Aminu/Davis/Harkless, then sure - fire away. If not, then any gain at SF isn't worth the price paid.