Feel like having a player that will help today is better than #15 especially given the need to make a jump.
Although if we jump into the top 4 or Murray fell to where we were at that could change the calculus a lot. Given the draft not seeming so sexy beyond the top 10 I could see this finally being the year we get a second FRP on or around draft day especially with some of the excess players we picked up at the end of last year.
Richaun SHOULD be a good trade piece given how good he was (and what his advanced stats looked like) to start last season, but I'd be surprised if he nets that much for McNair & co.
That said, if that deal were available, you're getting a bench wing in Oubre who put up 15 ppg and 4 rpg this last season. That definitely fills a need. Plus Oubre is in a contract year so he's likely to play well while being a low risk move since the Kings can just let him walk if it doesn't work out.
But as for the pick, there are a lot of guys I like in that late lottery range. Eason, Branham, Agbaji, Sochan, Liddell and Brown. Likely at least 2-3 of those guys are there at #15. Possibly Dieng too though I'm still not all that high on him.
Mock drafts are pretty inaccurate at this stage, but looking at Tankathon, The Ringer, and NBA Draft Room would all suggest the Kings at 7 or 8 could grab Mathurin and at 15 could take Tari Eason. I'm still in favor of re-signing DDV and making an offer to Hartenstein to be Sabonis' backup. And the Kings have two 2nd rounders to take some swings with
C Sabonis/Hartenstein/Len or Queta
PF Lyles/Eason/Metu
SF Barnes/Oubre/Harkless or Holiday
SG DiVincenzo/Mathurin/Davis
PG Fox/Mitchell/FA or 2nd round pick PG
is a pretty solid and very deep team that still has a lot of development potential.