There are a few things I notice over and over again in merges that are simple errors or oversights, but that can easily lead to problems once the profiles are public and start being compared to others. For several of them it seems like a few programming fixes could make a big difference so far as clean data is concerned.
Date estimates:
I have (as I assume many do) multiple people with the same name, and in fact, the same sibling names, in my family tree. When there's no date info given with them, the merge issues page tries to encourage me to merge them, even though they're sometimes several hundred years apart in age. Would it be possible to generate approximate dates for such entries so as to avoid such issues? I mean, the system does know what generation these people are, it should be able to extrapolate that my 12th great-grandmother and 6th great-grandaunt did not live at the same time. It doesn't have to be anything *at all* accurate, and could be as simple as 'pre-[date of first child's birth]' or 'post-[parent's birthdate]', but it would just be nice to have approximate dates show up so you can tell the difference between generations in a glance.
Assumption of Death:
I'd like the system to be set to assume that any people entered with birthdates before, say, 1870, (and definitely who have given death dates) automatically set as 'false' for the living check box. I notice people miss it sometimes when they're in a hurry, and then the merge suggestions balk because those fields don't match. This is a fairly simple check, and would keep the data cleaner than it is currently.
Died in Infancy Indicator:
Additionally, it would be nice if there was some sort of indicator for 'died as a child'--a lot of times it's hard to tell if a family really did have three boys named William or if it's one child with multiple birthdates given in multiple trees. I think being able to mark that yes, this family had two boys named William who died as infants before one survived to adulthood would help keep data clean across the board.