For a while now we have had a filter for new questions that doesn't allow them to be posted until they pass a filter that checks for certain mistakes indicative of very low quality questions. Recently this filter has been altered to be more strict.
What is the goal of this filter? When users end up hitting this filter what are we expecting them to be doing?
For a small percentage of users they will be capable of just spending more time and effort on the question to fix enough of the issues to pass the filter. Personally I imagine that, by and large, if they were capable of writing a question good enough to pass the filter it's unlikely they would have hit it to begin with, so most of these users won't be capable of editing the question into appropriate shape on their own. Do others feel that a significant percentage of users will be able to edit the question into appropriate shape on their own. Note that some users in this position may find a way of bypassing the filter through some transformation without truly improving the question enough to be of even mediocre quality.
Some users will give up and not ask the question at all, since they cannot get past the filter on their own. Is this desirable? Are we assuming that these questions are of such low quality that they're better off being lost entirely? Do we really want these questions to just not be asked if they can't meet the filter, or is this case an unfortunate side effect of adding the filter?
Some users will seek help from outside the site, asking a friend, teacher, going to some other site, etc. to improve the grammar and other problems allowing them to post the question here without being blocked by the filter. Do we expect this to account for a noticeable percentage of users? Yes, if this happened it would be nice, as it's taking the burden of improving the lowest quality of questions off of our users, but can we expect a significant percentage of users to go through these steps?
Finally, other users will post on meta saying that they couldn't get past the filter and asking the meta community to improve their question. Is this desirable? Is this preferable to having these questions just not be blocked in the first place and just be posted on the main site and be edited into shape (or to have comments indicating how the OP should improve the question)? If this is preferable, how so; what is gained from such a meta question that wouldn't take place if the filter didn't exist?