Episodes I can think of right away that needed better staged shots are "Yesterday's Enterprise", "Q Who", "Redemption" (this one in particular. We are told the blockade was a total of 30 Federation ships, and we got to see, 3 kitbashes on screen? Is is really acceptable from a "purist" point of view? Wouldn't you rather see the 30 ships on screen since it would be so easy to recreate them in CGI?)
Redemption is a really bad example since it would make no sense to see all the ships in the shot because they're spread out over light years to secure the border.
As for the Warbirds, they do lack presence, but that's because they never actually do anything in TNG.
Redemption is a good example, because at the beginning of the trip to the Neutral Zone, all the ships are together in a convoy. I'd like to see more than 3, not all 30 are necessary, but they have a chance to CGI in at least 10-12 or more ships.
The Warbirds were always shown as confrontational, and this is only because of the budget they had (couldn't keep showing battles, too much money to keep blowing up models).
And this really is my biggest gripe with the whole concept of keeping it "true to the original".
It was only "original" because they didn't have the budget do massively upscaled battle sequences. A good example would be "The Survivors". They actually did a great job with the battle sequences there, but only because I understand that for the time, this was a huge undertaking! and I was happy to get that much on screen. That battle would be more kick ass if they actually have the ships do more on screen.
I still have my hopes that they will. Keeping it "true to the original" can mean true to the original intent.
Think of TOS-R's "The Doomsday Machine". I know the casual viewer who remembers the original episode was blown away by the remake. I know my dad was, he loves TOS, but now he adores it. I believe TOS-R stayed true to the series, as the same scenes were kept but updated (like the more realistic matte paintings, etc). When the episode needed it though, like in Doomsday Machine, they freakin' delivered! Why can't they do the same with TNG. I'd be happy if they keep everything the same, but enhance the scenes with the Borg Battles, key scenes with Romulans, and the last fight with the Klingons in AGT.
From what I've seen so far, the remastering is worth buying the Blu-ray sets when they come out, so they already got me hooked. I'm a beggar and I can complain, but I'll take anything better than what's there now.