Having been "core4," I can confirm your statement. I look forward to us having a core-6 this year: Gobert, Hayward, Favors, Exum, Burks and Hood. Really only two players away from where we need to be: a third big and a backup (or starting) PG. Not saying we CAN'T upgrade from those six, but I think that's a very good group, with all having skill sets that are very valuable.
And when this thread DOES get bumped, let me say that I NEVER, EVER considered trading Favors. Not for the 4th pick, not for anyone. He's an integral part of the team and I think Checketts was just stirring the pot. Millsap is ONLY being considered as the 3rd big. There is NO WAY Lindsey is considering messing with the chemistry of this team or pissing off Rudy. Derrick is not only developing into a great PF, but he slides over when Rudy comes out and becomes one of the best backup 5's in the league.