It bothers me that in all the latter appearances, Sirtis stopped playing Deanna Troi and just played Marina Sirtis.
Does it bother anyone else?
Or (since Troi was seemingly never too popular) was it an improvement?
I think this was an improvement. Her original greek-inspired accent sounded like a speech-impediment. It was the biggest problem I had with the character. She's much more charming with her regular UK accent.