Were people distracted that Pertwee looked older in The Five Doctors?
Or Tennant in Day of The Doctor?
Does something like visual continuity make that big of a difference in Doctor Who?
Honestly, I couldn't care less. For example, I enjoy The Two Doctors a lot, regardless of the obviously older ages of The Doctor and Jamie (although I'm also a fan of the Season 6B theory, so for me that has an explanation). But, yeah, it didn't bother me in The Five Doctors, and Tennant really didn't look much older to me in DotD. Its not a big issue, and not the main reason I'm thinking Simm's Master will be post TEOT, but its just something to mention.