I love Kessler and think he could be a nice Horford replacement, what worries me a little though is I see quite a few in the Boston media who say Kessler isn't that much of an upgrade over Kornet. Like, if Kornet got similar usage and an increased role he could put up similar numbers. I think Kessler is a lot better but idk.
Kessler is much better than Kornet, particularly on defense.
The question is, do you want to give up multiple #1s for a role player?
Not only that, but do you want to give up multiple firsts AND give the guy a big contract right when you as a team are already projected to be the most expensive NBA team of all time?
He is cheap next year at just 4.9 million, but then you need to pay him. Unless the plan is to dump Holiday or KP the C's just don't have the money to pay him. The C's will probably already have to dump one of those two even WITHOUT paying a guy like Kessler.
I think he's better than Kornet, i don't think he's so much better that you give up multiple firsts and pay him like 20 million when you can just have Kornet on a minimum.
The only way it MIGHT make sense is if you plan on trading KP, use whatever you get to trade for Kessler, and make him the starting center next year. You save like 25 million in salary and literally like 100 million in tax next year as a result. Then you extend him and move forward with him INSTEAD of Porzingis.