The 'cartoonyness' of campaign cartographer is really a function of the chosen images used in the maps you've seen. Other choices, especially more recent stuff with PNGs greatly improve maps. (An over-riding problem is CC2 is a lack of the transparency pngs provide.) There's no getting around the affects of using someone else's art in your work - its going to look like your sources. In exchange you get shorter production time and a reliable quality of components.
CC3 is a distinct improvement on many levels.
I'm not a CC user but I was impressed with the latest version.