Almost certainly not at all relevant; the strength of Gitaxian Probe was its absurd efficiency, since it didn't cost you mana or card resources, whereas Telepathy costs you both. Plus, I really couldn't imagine anyone playing Telepathy while Peek is still in the format.
January 9, 2017 3:50 p.m.
I consider Telepathy a staple in any of my Blue EDH decks. The information advantage you get with 3 or more opponents is amazing. Plus it helps with politicking when everyone sees someone draw their wincon.
For modern? I don't know, the value of the information is a lot lower given the 1v1 structure (if you're playing multiplayer modern, I would try it for sure). The decks are also much more likely to follow archetypal patterns, so the number of surprise cards should be relatively low.