as far as we know, the map drawing will not change in CK, ever.
So please, don't report errors about the map in the bug forum.
There are certain changes that could be made though, like province ownership or province culture at the begining of a scenario. But you have to have a very strong backed-up case with evidences, and you may want to discuss it first with other forumers in the Crusader Kings - Scenarios and Modifications subforum.
Performance problems are nearly impossible to corner, because:
- We all have different hardwares
- We all are running different programs or services at the same time as CK on our PC
- We all have different game situation.
So they are extremely difficult to reproduce and fix.
As a rule, I'd prefer people not to report them...
I am sure Paradox do whatever is possible to improve performance wherever they can.