villagers ahve problems with multifloor pathing or pathing through multiple doors. 

they cant find  their workstations if you move them and non is withint 10 blocks on level ground.. 

even when i put stairs there for them to go down
villager pathing should prefer to climb stairs over blocks.. 

they should never path over a lit campfire and hurt themselves   or anything that hurts them at least once ( leaarn to avoid pricly bushes  and enther roses after once touched and hurt)

they should not try to climb on top of workstations..  it seems they only lok at x and z for location and not y . and thus if a workstation moved below they cant find it to recharge.. they go to the xz location and  hang out there thinking the workstation is under thier feet.. 
they should path to the SIDE of the bolcks of the workstation and not the top

1. they look stupid always climbing on top of the workstaion . even wehn its not possible. 
2. if you ahve somethign on top say a end rod for light.. they path and get stuck there and cant get off
3. any time they get stuck and cant move for 10 seconds  they should try a diffrent way 

( they seem to think that a diagonal move is ok when they cant actually move diagonally to that block. and will plant thier face in a corner and get stuck..  same with xombies and other mobs. .. its  pathetic.. and certainly a bug.. they should be smart enough to  decide to go left or right and find a new way  as they havent reached destination within an allotied time..

of course they can stop or give up  if they dont have anywhere to go 

it would be FANTASTIC to see a though bubble upgrade to villagers and friendlies.. 
ie  wants liek food or workstation  or bed. or babies.. 

naming a baby villager with a nametag should keep it a baby.. same with  animals. 
or naming it and feedign it a golden apple ?