Then we may have to need Siakam to improve his passing, and get a center who can play good mobile defence (not just man to man; looking at you JV) and score downlow.
As I said before, there aren't many centres that can do what Gasol does. There are very few big men that can pass the ball like a guard and be a defensive stalwart. These guys are extremely rare because they have extremely high basketball IQs and tremendous instincts; these traits cannot be taught nor learned.
At this moment, only Jokic and Horford have these skills. Now, there are great centres in the league, but they have limitations. Embiid is a stellar player - terrific offensive and defensive player but not a great passer nor facilitator. KAT is more of a scorer and has improved as a passer. He isn't, however, a great defensive player. Anthony Davis prefers to play PF, but he can play C and do a lot of what Gasol does, although he's a slightly above-average passer. Gobert is a defensive stopper that offers just enough offensively. Vucevic gives you scoring and good passing, but only adequate defence. Andre Drummond is a very good passer and an excellent shot blocker, but his overall defence is so-so and his offensive game is really limited.
Most centres are bangers, rebounders, and screen setters and for obvious reasons. Having a Gasol is a luxury that few teams have and will ever have.
sabonis has a chance to be a guy like that, or at least close enough. Doesn't quite have the same size, but in today's league, he's probably big enough.