Maius Intra Qua Extra

Oh, yes, I have to agree that his voice has changed a lot. You can even hear the difference if you compare performances he's done with his normal voice, for example, Much Ado About Nothing vs. Broadchurch. It doesn't bother me, though, and maybe that's because I'm used to the audios, in which all of the classic characters are played by actors who are much older now and rarely sound like they used to when they were on the show. In particular, Peter Davison sounds barely like his young Doctor. But most of them nail the character, if not the youth.

As an aside, the one I'm really impressed with is Carole Ann Ford. She's in her 70s now, and she still performs her teen-aged role really well. What's more, the performance of hers that I listened to was an audiobook in which she also did the voice of the First Doctor, and she was incredible. Yes, you could still tell it was a woman doing the voice, but the style, quality, and inflections were perfect.