IMHO All the Knicks gave away for Kemba dump was 4 excess 2nd rounders and got back cap space (lots of obvious possibilities here) and a roster spot and moved a 2023 1st round pick to 2025.
Let's start time just after the Knicks traded pick #11, here is the summary of all the Knicks FUTURE assets at that moment:
2023 Knicks 1st
2023 Dallas 1st (protected 1-10 until 2025) [mostly likely 2023?]
2023 Denver 1st (protected 1-14 until 2025) [mostly likely 2023?]
2023 Detroit 1st (protected 1-18 until 2024, protected 1-13 in 2025, protected 1-11 in 2026, protected 1-9 in 2027) [mostly likely 2025?]
2023 Washington 1st (protected 1-14 in 2023, protected 1-12 in 2024, protected 1-10 in 2025, protected 1-8 in 2026) [mostly likely 2023, definitely 2024?]
2023 Knicks 2nd
2023 Utah 2nd
2023 Dallas and Miami (more favorable) 2nd
2024 Knicks 1st
2024 Knicks 2nd
2024 Utah or Cleveland (more favorable) 2nd
2024 Detroit 2nd
2024 Miami 2nd
2025 Knicks 1st
2025 Knicks 2nd
2025 Brooklyn 2nd
Knicks had 8 (possible) picks in the double draft of 2023 and 5 picks in 2024. 13 picks in the next 2 years is bonkers. There is some likelihood that 4 of the 1sts hit in 2023?
Now, you never want to just give away assets but some times assets have less value for you in a particular draft. Do the Knicks REALLY need 4 second round picks in 2024? It's good in theory but not so much when most of them are likely late second rounders. So for the Knicks, those types of picks at this moment really don't have any heavy additional value (do you REALLY need 3 second rounders in a draft where you have 3-4 possible first rounders?). This is exactly the time you cull the herd and use your peanut assets.
The Knicks moved off of Kemba, 2024 Knicks 2nd (for which they have 3 other picks in the second round) and the 3 2023 second round picks in a draft where they most likely will have 3 first rounders from Knicks, Dallas, Washington 1st rounders. The cost of the Kemba dump IMHO is second rounders in a draft where you have a ton of first rounders already. I think that is not excessive.
So here is your asset list after the CHA/DET/NYK 3 way trade with Kemba off cap (cap space now ~$17M with 2022 pick, Kemba and Taj off)
2023 Knicks 1st
2023 Dallas 1st (protected 1-10 until 2025) [mostly likely 2023?]
2023 Detroit 1st (protected 1-18 until 2024, protected 1-13 in 2025, protected 1-11 in 2026, protected 1-9 in 2027) [mostly likely 2025?]
2023 Washington 1st (protected 1-14 in 2023, protected 1-12 in 2024, protected 1-10 in 2025, protected 1-8 in 2026) [mostly likely 2023?]
2024 Knicks 1st
2024 Utah or Cleveland (more favorable) 2nd
2024 Detroit 2nd
2024 Miami 2nd
2025 Knicks 1st
2025 Milwaukee 1st (protected 1-4)
2025 Knicks 2nd
2025 Brooklyn 2nd
For me, in essence, the Knicks moved the Denver 2023 (protected 1-14, so likely around #25) to a 2025 Milwaukee (protected 1-4) and moved off of 4 second round picks 2 of which were going to be very late picks.
If the Knicks do use the cap space to nab Brunson, the will have used the cap space saved by 2022 #11 pick, Kemba gone and 4 second round picks while moving the Denver 2023 pick to the Milwaukee 2025 pick.
I hope and think I got the details right.