Jermaine will be better than most of you expect. I don't know about 20/10, but here is why he will be better and why he will make our offense better.
First, he will be better because of who he will be on the floor with. He will not have to be a first or second option. He will benefit from being on the floor with PP and Ray, who can both spread the floor, not to mention playing with Rondo and an unselfish, great passer like KG.
JO will make our offense better because he will give us a legitimate low post presence, something Perk does not. JO can score on the block, as well as consistently hit baseline and top of the key jumpers. He is also a better offensive rebounder than Perl and is more athletic.
His post presence will lead to more inside-out offense and many better looks for Ray and PP. He and KG will be a great tandem in the post with the high-low game.
The key will be his health. I had the privilege of following his career in high school and working with him for three summers at Alex English's basketball camp when I was a HS coach in SC. He is very skilled.
Both JO and KG came out back to back years, and both went straight to the NBA, which hurt, because one or both could have ended up playing college basketball at USC-East.
But I digress. The point is that if JO can stay healthy, I think our team is gonna be really tough to defend.
While he may not be as big or tough as Perk, JO is a better shot blocker and can hold his own on the defensive end as well.