Having in game editors (be them for characters, their portraits, dynasties, the map, heraldry) may make developpers gain more time when they make the scenarios than they lose coding the editors, so I'm not convinced that this suggestion is bad.
Paradox stopped with making editors after EU2. There was one for HoI2, but that one was 'usermade' and just released together with the game. The editor was never updated or supported by Paradox.
Since they have released a lot of games after that, without editors it is very unlikely that CK will have an editor.
When during the development of EUIII people asked if it came with a editor, Johan said 'yes, the best editor there is: Wordpad'.