I have just over 400 fate.
I did a little testing on BR with power-share and drain last week. I forgot to save my parses, but my impressions are similar to those mentioned by Moebius and others. Overall, I didn't feel any major difference or any source of concern. For fights like the BG Lieutenant where power-shortages are part of the mechanic, it might be helpful to have set of icpr/fate-oriented gear.
Of course, everything is changing so it remains to be seen what will really be needed. Then, there's the upcoming "skill pruning" and "major" overhaul of all classes. Seems like the best thing to do right now is just play for fun and gather random items with fate on it.