Full Metal Alchemist - the flaws?

*Warning spoilers*

I've been rewatching it recently. Minus its tracking off from the manga story, if you look at the series at itself it is quite brilliant. The tragedy is plays is quite brilliant. And when the comedy comes its just hillarious (the episode with Al versus Roy). Just that when you watch don't expect a lovey dovery ending or feel. The series central theme is tragedy. You will cry sometimes watching it (Nina).

The parrelel universe was a real bad part of the series. Ridiculuous concept. But other than that as an anime series, its quite perfect. Are there any other flaws in this series?

Correct me if im wrong, because i havent watched in a while but i kind of didnt get the timeline that the homunculi lived on. When they are born do they look just like the person the alchemist was trying to ressurect when they died?

And also, people say they do not have emotions but it pretty much looked like they had emotion to me. Especially Lust and Wrath and sometime near the end, you see Gluttony's connection with Lust. Why the hell would be calling for Lust and acting like a complete retard if he hadn't grown attached to her? How is that not having emotion?