I play on Suicidal, and I'd be thrilled if I had to go back down to Intelligent after the patch
EDIT: Be a tech whore by taking the 50% diplomacy custom racial ability and populist polital party -- and eventually getting Total Majesty tech (not hard). Also known as "Jedi" level diplomacy. I go 50% diplomacy, and 50% research.
I would almost prefer 50% diplomacy and 50% military production (I think you'd even get points left over), but the AIs don't like to buy my ships for a good enough profit (even when they are at war against a vastly superior opponent), which would make the "war profiteer" style too inneficient for the higher difficulties IMO. Most likely that's purposefully done, since the AI (prior 1.1 atleast) wouldn't know a well designed ship from a glass hammer.