Questions for ableton users !!

High guyz , i'm mastering live 9 and i want to ask you guyz some questions :
 
1) i was unable to use it rewire in X1 , it appears but when i open it : nothing !
2) the folder/projectfile magement is a headache and a pain , if anyone coul explain this simply it would be cool !
3) Same project (light)as X1 but way more CPU (cpu asio meter in live ) !!! it looks that even if my real cpu are chilling , this thing jump like at 40 % to easy versus sonar !!! don't you find it less cpu efficient (reminds me PT pre 11)
4) PDC : is it a joke ? i inseted a PCM room (pre delay at zero) on u bus , made a send on a track and i hear some preday like crazy , i inserted it the in the track FX bin instead of making a send : nothing !!, rechecked via send : delay ...
Are we supposed to work on ly with zero latency plugins in this thing ?
5) No plugin layout or shorcuts management ?
 
 
Thks guyz ;)