Like many users, I use the corkboard to plot my MS and what I would find really valuable is an option to use different coloured fonts and bold font on the cards so that I can easly colour-code my GMC, POV, Characters Names, Setting, etc. Is this an option than can be considered for future versions? Thank you. 
The synopsis is intentionally plain-text, as it is used in a few contexts where having a full rich text editing component would get in the way, such as how you can hover over an item in the Binder and get the synopsis text in a tooltip, or how in the Outliner you can edit title and synopsis together in an inline arrangement. Such a convenience would be impossible if the heavy-duty rich text editing subsystem were necessary. It’s also in part a design decision: to reinforce that these are meant to be used as simple short notes.
One comment I’d have: it strikes me that colour-coding text like that would be very time intensive, especially when there are a few tools that let you colour-code or otherwise mark cards, already. Have a look at figure 12.1, on pg. 139 of the user manual. You can pack quite a lot of information into the various optional embellishments that are available.