The Kings were never good at draft picks. We win on free agency players.
This wouldn't seem to be supported by the last 20 years or so. In fact, in that time frame we've had I believe one truly major free agent signing (of a player who was not already on the team) - and that was Vlade Divac. We also signed Bobby Jackson as a free agent. So that's two from the glory years. In the current era, Rondo's one year deal is working out OK while Koufos and Belinelli are somewhat mixed bags. And before that, what were the big free agent moves that we made? Nothing seems to move the needle in my memory. Given that Rondo is on a one-year deal and we're struggling to stay over .400, I don't think we can yet call any of our acquisitions this year "wins". We may have two free agency "wins" in the last two decades, and both of those are over 15 years old.
But the draft, on the other hand, got us Corliss, Peja, J-Will, Hedo, Gerald, Martin, and Cousins along with more debatable pieces like Tyreke, IT, and WCS. Now, we didn't always keep those guys, but most of the time when we didn't we at least traded them for guys that helped. I think it's safe to say that at least the first seven I listed there are equivalent "wins" to the signing of BJax in free agency, and the last three are debatable or TBD - still, maybe 10 "wins" in the draft in the last two decades.
Some of our biggest wins have happened in the trade market, to be honest. Off the top of my head, we traded for Richmond, Webber, Bibby, Christie, Miller, Artest, and Gay, and while we gave up assets (including several of the picks listed previously) I think it's clear that all of those trades were winners (though some might argue with the Peja/Artest trade) and they all definitely got us key components of our team.
Free agency has probably been the weakest of the three player-acquisition routes for the Kings in the last two decades.