i was thinking that the improvement I would like most is a Profile Alert, being one binary byte to indicate "Improbable date". Eg when dob>dod, or dob<dod+110.
But secondly I would find it useful if there were another tree, having data similar to that shown on profile view. Line 1 would have parents, line 2 the person and his/her spouses, line 3 the offspring (but linked to the appropriate spopuse). This would be helpful. I do hope it is possible and popular.