My opinion on the cedilla mess is the following:
* Add preemptively LATIN [CAPITAL|LOWERCASE] LETTER * WITH CEDILLA ATTACHED for every Latvian/Livonian character currently in UNicode. (Don't use terms like MARSHALLESE [CAPITAL|LOWERCASE] LETTER [M|N] -- such entities don't exist from a character encoding point of view.)
* Declare the list of exceptions to Cedilla rendering officially closed. Whenever another such thing (say, LATIN CAPITAL LETTER P WITH COMMA BELOW / LATIN LOWERCASE LETTER P WITH TURNED COMMA ABOVE) occurs in real life, it will be encoded ... WITH COMMA BELOW.
* Font design is an entirely different field. Original german font designs differ from french or anglo-american ones in several aspects, and original marshallese font desgns will be different, too. I see no problem here. I doubt that "one size fits it all" is the right way to tackle font design.
--Jörg Knappen