MacBook taking a long time to wake from sleep after Sierra
Have you tried resetting your System Management Controller?

To do this on your MacBook, follow these steps:


Shut down your computer (a full shut down, not just logging out)
Keep the power cable plugged in.
Press at the same time shiftoptioncontrol (on the left side of the keyboard) and the power button
Let go
Turn your computer back on with the power button.


If that doesn't help you could also reset your NVRAM as follows:


Shut down your machine (a full shut down, not just logging out)
Press the power button and then press the commandoptionpr keys. You have to make sure you press these keys before the gray screen appears or it won’t work.
Hold those keys down until your Mac reboots again and you here the startup chime.
Let go of the keys and let your Mac reboot normally.


Note: When you log back in you may need to readjust some of your system preferences (e.g. mouse speed, time and date/timezone, etc).