I think 1-2 issues is a bit too early to be rocking the boat too much, although there are some instances where they should probably revamp or cut books and those are for the most part books that are carrying over from pre-Convergence like Teen Titans, which is still struggling.
That book more than any other needs a good shake up - new creators, new characters, new direction. I'm actually stunned that they haven't redesigned Tim's costume yet.