Only to say that we have used them, of course mostly in campaigns and less in one-offs.
Designing a character that can develop a following can work quite well, we have had very interesting game sessions with Players who run characters who have, effectively, body guards that get things done and fight for them when necessary, ultimately resulting in the start of a small fiefdom of sorts, maybe a preliminary Thorz type character. :) It allows for the leader-oriented in the group to leverage others' talents to the benefit of the party.
The more difficult aspect of these talents is that it requires more forethought, work, and interaction to develop this type of character, and some people just want to hack and slash.
That said, if space is a premium and something has to go, it might be on my list, just to preserve other more often used talents. But if not, we, at least, use these talents to make for both interesting PCs *and*, especially, NPCs! :)
Spend one minute to remember the Riddle of Steel and consider... ;)
https://www.youtube.com/watch?v=9p2BjhSEnNI