Seriously? "That whole Peter Davison Aging Crap"? Why does it matter? He was instantly recognizable, so, his hair part is a little thinner, not a big deal?
I even watched a Fan Edit version on YouTube, that spliced it into Time Flight, and it wasn't jarring at all for me? I rationalize the aging for the Multi-Doctor "Team Up" Specials in my own mind, that once regenerated, the previous Doctor lives on in an alternate Time Line, while the newly Regenerated Doctor takes over the Prime Timeline, this also explains for me how multiple Doctors are available all at once to be available for the "team up"
I can't fathom how the slight change in Davison's appearance after all these years could produce such a strong negative reaction?