I agree, calculating multiple blood lines should not be that difficult for FTM, although I do have a ggrandmother who married her 1st cousin once removed ;>) Some interesting descendant relationships there.
When I said 'flawless' import from Legacy, I should clarify I just meant it was an error free log, except for a 100 date records, ...I didn't really validate that all the data came through right. But the overall stats for media and people was right on.
The really nice thing is that that FTM able to point to exactly the same directories of photos & docs automatically. That suits my needs perfectly.