You can improve UV coverage a bit but removing redundant duplicate baselines. Which is what pseudo-random patterns do. And these are used e.g. by Lofar. But the

You can improve UV coverage a bit but removing redundant duplicate baselines. Which is what pseudo-random patterns do. And these are used e.g. by Lofar. But the problem of lacking very small baselines to fill in very large scales on the sky remains. Interferometer are simply not very good for imaging extended objects. And of course the other thing is that you might have less reflective area in total and thus lower sensitivity for dim things.