I legit think brand does too much damage.
I play brand a lot and i truly believe he needs to be toned down. His poke is spammable, safe and deals massive amounts of damage. His teamfight capability is absurd. He clicks r and wins a teamfight.
a match where i ended with almost 13k gold, my top and adc had SIGNIFICANTLY more gold than me. https://imgur.com/ObXposU
Yet, i did 5k more damage than them.
He deals too much damage without alot of AP and it's just too much IMO.
The reason could be within his core build which is

But nonetheless his damage is absurd. i had matches where i easily did 20-25k more damage than everyone in the game while having around the same gold as them.
For a support which is a role deprived of gold i think he shouldn't be able to deal more than carry damage.
I didn't even get a
... i had to get 
being OP (RIP Avarice Blade) and champions that had things that could grant gold to enemies would never be played (Heim, Zyra, Yorick) I'm clearly exaggerating but gold really isn't as big a factor as some may think. There's plenty of pro games where one team is behind in kills, gold, a dragon or so, maybe 1/2 towers up, but yet still loses.