[DTownSMR]

The upcoming ChordPro standard (fwiw) will contain the "key" directive but not the abbreviation "k".
In general, please do not use abbreviations if not neccessary. You type the keyword in. Once. In a file. Using a convenient editor. Is it really important to save two keystrokes?

I'm actually not typing it in. I use a program to convert screen scrapes. I highlight the key, and press "Key" in the sidebar and it formats the data as a chordPro directive. That program uses abbreviations and is out of my control.

IMHO removing abbreviations, whose use seems to be pretty widespread, will not benefit the standard.