Brightwing can cover up your team's mistakes so well. Your opponent is out of position and away from the team getting ganked? Z in and save him. Your tank dove too hard or got pushed out of position? Blink heal in and burst HP onto him. Your team mates have no idea how to slow a fleeing hero? E your DPS and have him kill him. Channeling ult going on from the other team? W them.Yea, now that Brightwing is free, pretty much win in pubs. Really liking that hero.
The only time I have major issues is if my team absolutely refuses to not take team fights before I'm 10. Worse yet if they take like a level 5 before I get my level 7 talent to heal on ability use. We can then get to like level 8 and the other team gets 10 and their ults then just snowballs from there.