I don't know man, I really, really like siakam and I fully appreciate what he does and what he will be doing in the future. It would almost literally break my heart to see him go, and I will always be a huge fan of him.
But the NBA playoffs are,and always have been, about stars, and Siakam is not a star right now, Beal is. Beal will make it impossible to really double kawhi, siakam does not. I guarantee you that there will be a point in the playoffs where you will wish you had a guy like Beal on the team. And the combination of OG and Beal gives you everything siakam gives you and more.
But, I get it - I am 100% happy to keep the team as it is, and let the chips fall where they may. I will definitely enjoy next season more if kawhi leaves and we're left with pascal instead of Beal, even though a Beal team would be better (imo).
Still, I believe that Beal would make the team better this season, especially deep in the playoffs. Not significantly better, but it would be pretty much the only avenue to really upgrade us.
I don't think the wizards give up beal without both OG and Siakam. And that's just too much man.
I would consider a package surrounding OG and parts for Beal, even though that makes me very sad.