One of the biggest problems with 'The Time of Angels/Flesh and Stone' is that the angels just weren't as scary this time round.
And that's because it requires exacting camera work and an eye for good shots, to pull off consistent menace with something you know (or think you know) you aren't going to see moving.
Get it even slightly wrong, catch them in the wrong light or the wrong pose, too close in or too far away, and they just look like completely unthreatening props.
Take the bit where the soldiers are firing at them. The muzzle flares is supposed to recreate the amazing scene in 'Blink' with the flickering light.
But whereas that scene worked superbly, the scene in the newer episode did not. It wasn't as well shot, and it didn't have anything like the visual power of 'Blink's scene.
By the time the angels do start moving in 'Flesh and Stone', they have been all but forgotten. Other than the scene with the TV in TTOA, they had no good scenes up to that point, and were being upstaged in their own episode by the cracks story.
The scene with them moving is excellent though, and instantly recaptures the dread we all expected to feel at seeing them again, but didn't (again, except the TV scene).
It helps that the angels have actual actors (or at least virtual actors, if it was CGI) playing them in those shots, and seem that much more real and threatening, than the obviously prop-like angel statues.
I understand where you're coming from on this, but I really do think that scene where they move saved the angels from a generally underwhelming showing in this 2 parter.
To be fair to Moffat and... Adam Smith was it? Well, whoever it was directing, the 2 parter exposed that the angels, whilst seeming cool in an episode like 'Blink', have so many problems to overcome when putting them in a more action oriented episode.
They had to be given all sorts of new abilities (and also be basically stripped on one of the main abilties we know they had), and we had to be given the opportunity to see them move, because otherwise, they just couldn't hold another full narrative.
With no verbal interaction between them and the Doctor, no motives, and no way to consistently keep track of the threat they posed without constantly stopping and starting as people look at them, the episode would have been a bust.
Hence all the changes, additions and stylistic decisions. As I say, I still don't think it worked out that well for them over the 2 parter, but I respect the thought that went into how to use them in this kind of episode. (And I still think the episodes are alright, but more for the cracks story and not for the Angels themselves, this time).