It doesn't seem like such a pre-mature optimization. If two people are only interested in long-term relationships, it is a tremendous waste of their time to go on 1 or 2 dates for several hours and then discover that things won't work out. Rinse and repeat a dozen times and it certainly makes sense to filter out the large percent of people who don't fit longer term.

Sure more things can be done to boost personality compatibility, but the long-term filters are very useful.