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Well, if you don't mind that PDFs made from your fonts may not always get the underlying text represented correctly (for searchability, copy/paste, even indexing I suppose), then you can just ignore the issue.
And wtf is a "Kmonospace"?
0x00E4 -> /adieresis
0x00E4 -> /a /dieresiscomb
Especially with the upcoming WOFF2, I'd be all in favor for sitting down and discussing a set of stricter rules when it comes to "what should be inside".
For PDF creation with format 3 post table, applications should use cmap to generate postscript names