Seems good to me. And now you have a real package installed 
I dont know if the blacklist would still be required or not - you could always check one way or the other.
So really the steps were:
- (!) Bonus - if manually installed driver previously, remove
- 1 - Install available driver (if not in mhwd/repos … then check AUR … in this case: link)
- 2 - Fix any driver quirks
(known quirks with 8192EU: mac randomization, possible module collision withrtl8xxxu)