I've had about 100 hours or so in our TF2 Servers over the course of a year or so. I wouldn't call myself active in that division, but it is a decent amount time spent in it for a game I do (generally) dislike. I spend my fair amount of time in our scrim servers (Csgo) and our overall teamspeak.
What makes you say this? Co-leader may have held such a power, but community leaders do not. Community leaders are supposed to moderate the forums, handle certain situations such as abuse/higher up problems, and teamspeak issues. CL's have their bounds as do DL's, DM's, ect. Or this was how it was operated before the leader position was removed, now I have no idea.
But I do agree when the CL interaction with the TF2 is minimal, for one reason or another. I feel if the TF2 community held more events I'd interact quite a bit more. I've joined whenever I knew the TF2 members just created the Slender server and needed people, but I've never been the type to hang out. Maybe that's my own fault. :(