Would you prefer to see a mix of traditional mattes paintings with CGI, or all-cgi ones like Enterprise was. It occurred to me after looking at the latest matte from TOS-R that some of the good quality mattes in STNG could also be redone in 3D fashion. There really would be no edict that they would have to make them look like FX of the day. A CGI matte would not be too far off.
I say leave TNG alone. It's good enough as it is, we had the effects to make the show good. For TOS it was understandable, because even though effects were ok for its time, it still wasn't the same as we have now.