I have no doubt it will be improved. I'm just not sure how it will or can be improved to narrow it down in a way that won't ultimately discard potential matches that actually match but have discrepancies.
When I said people are fallible, I meant they make typos, they accidentally enter birth and death dates for a sibling, parent, or spouse, they get the proper name wrong, they get the middle name wrong, they spell the surname incorrectly, etc. There are so many reasons the correct match may look like the wrong match due to human error I'm not sure it is beneficial to tweak the algorithm to the point it discards these possibilities.
I will say that I have seen some totally off the wall "matches", though. The surname you mentioned could easily be a misspelling or a variation but some aren't even close beyond the first few letters. ;-P