I went just before the lottery funding (2009 i think?). The national museum of computing was reasonably new - obviously the intended purpose was to attract more people and stop it falling down. The split was successful in this way. I appreciated both sides - bletchley park was a lot more history (with volunteers who could tell you more about it than you needed) and the NMC had old consoles set up playing games, amongst the rebuilt WWII stuff. Best museum ive (group) i b e been to anywhere. Im happy they are getting more funding though of course the quality will gradually decrease.