KP can be uninstalled, as good as BackupMenu (kudos to the author) is I did once get my device in non-bootable state when restoring very old backup, so risk is there.
Here is a quote from merlin's CSSU stable announcement thread:
It was mentioned many times here how people were angry at Nokia breaking things with 1.3, including a fix that results in the same, with only ssh+screen+vim/less scenario fixed is not worth it for me to keep on-topic (especially that editing rc files is an optional solution, check the bug's thread). So you might repeat magical bugfixes that are great, this one example is of a not so great decision.
Also hildon stability/leak is fixed by KP alone it seems.