I tried it in the past - differently from your successful experience (at least once, you said), mine was never successful maybe for the too long (4m) cable of the Vive. I also had problem in extending the LM cable so that it can't actually be no more than ~3m.
Yet, since one year I'm very happy with my wireless setup done by a Vive, a TPCast modified w/ the OpenTPCast software, and a Leap Motion of course. (Wireless Vive w/ Leap Motion)
Performances in wireless are 33fps wrt. 43fps of the wired version.