Really, how many variants of the Doctors do we need?
Much as I love Hartnell, I'm not going to buy 1st Doctor in Aztec clothes, in monk-habit from the Time Meddler, toga from the Romans, atmospheric density jacket from Web Planet, borrowed robes from the Crusade... Hartnell changed out of his standard costume an awful lot!
And then you could add in Pertwee in jeans and t-shirt from season seven.
Some variants are nice... but the TNG figures reached the point where they came pretty close to putting out 'Picard with coffee stain on his uniform, from Q Who?', and I don't want Who to go that way. The 'Ghostbuster' Tennant was already bad enough.