He didnt exactly spend Time Flight mourning and having flashbacks and getting teary, though, did he?

No, he told the girls that Adric wouldn't want him to mourn unnecessarily. And said he was taking them somewhere to cheer them all up, get their minds off it, help them move on as quickly as he did.

Oh yes, his entire incarnation was plagued with guilt over Adric, thats why he took to Turlough like he did.

But it was good in both situations that mention was made in the next episode of the lost companion, but I liked PD's alien expression (and Tom's even moreso) more than DT's watery eyes.

This is all my opinion of course. I'm nobody but a fan, thats all.