I agree, being able to record attempts (or "fell/hung" as MP calls it) would be a nice addition.
Oftentimes I would like to record the routes I try because I like to go back and see what routes were attempted, even if not completed.
I have a pretty bad memory so if I don't note it down, then two months later when I tell someone about "that really great route that kicked my butt", I wouldn't know what it was!
I understand that there are some strong feelings about ticks only being for climbs you've done free, but I think being open to multiple interpretations of the system would be better.
As @emurray100 says, excluding those from cumulative stats would probably head off those concerns.