Personally I'm hesistant to leave any coins on any exchange after losing my deposits to Ukyo and Bitfunder / WeExchange.
What I don't understand is, why don't these big exchanges run them from countries without such ..... stringent rules? They could have their physical infrastructure in Cambodia or the Fiji Islands or Liberia, run it remotely from Belarus (or some place with better beaches) and then not have to worry as much about being whimsically shut down by the majority of the planet's countries which have their financial policy dictated to them by the Federal Reserve.
That's exactly what btc-e does. servers on cyprus, legal entity elsewhere, admins russian. Not falling under a single jurisdiction much