Wiktionary
a. 1 (context idiomatic English) all right, to a certain extent. 2 (context idiomatic English) true, as far as it goes.
Usage examples of "all very well".
Yes, all very well to see him so, with his clothes hanging on him like an old drab skin he could no longer fill.
It was all very well prepared, but Alex was not going to be seduced.
It was all very well to flirt with danger, to boast to their friends that they had been guests at the notorious Louis Ronsard's luxurious estate, to give him information that made them feel wicked and notorious too, but the reality of it was more brutal than they could have guessed.
It was all very well to allowthese barbarians their own honor - but what of her own!
That was all very well for a governor's aide-de-camp he could not guess how delicious was this food to a young naval officer fresh from beating about at sea in an overcrowded frigate.
This was all very well and logical, but there was no blinking the fact that he wished he were home.
It was all very well to do those things when it was merely a battle that lay before him, but this was the loss of his dearest friend.