I think the old Masterplan is still officially top, top secret to this day, but basically it was all about making the Doctor all mysterious and godlike and stuff, which can't be a bad idea (well, maybe not godlike, that may be going too far). I think as much as we will ever really know about it is the bonkers revelations about Gallifreyan history and the Doctor's home life that we got in NA novels like Time's Crucible and Lungbarrow. And I'd quite forgotten the Romana-dissing instance...grrr... >:( Well, there's no accounting for taste, I suppose.