Given that the current level seems to be too high, judging from the performance of the immigrants, raising it doesn't seem to make a lot of sense. If you raise the limit, given the bureaucratic approach we have to immigration policy, what it means is that we will bring in more immigrants, either from out of the backlog or from a higher number of applications accepted. So if you raise the number, more will come.
That doesn't say whether they're going to do better or not. My suspicion is that if you raise the number, they'll do worse.