I agree with you that the sound recording isn't very good, but my reading of it is quite different: I think the orchestra is loud and the violin isn't heard enough. In a piano concerto, a fully open grand is well able to compete with an orchestra of good size, but with a violin concerto one has to be more careful. Some years ago I heard in Paris the integral of Mozart's violin concertos, splendidly played in two concerts by Anne-Sophie Mutter: she wisely had a reduced orchestra of a handful of musicians only. But here the balance isn't right.
Also, if I much admire the beautiful sound and the virtuoso performance of this young violinist, I think that with the Tchaikowsky concerto she makes excessive use of the portamento. I thought that was now out of fashion; in any case I don't much like it. If that is thought to agree with the character of Tchaikowsky's music, it is open to discussion.