It's good for the game if Bounties are just rewarding enough to be worth doing, and no more. If the Bounty reward is too much then killing monsters feels bad in comparison - you're encouraged to do the absolute minimum completion goal of each Bounty and then get out of there as fast as possible to speedrun the next one. Bounties are ultimately just an excuse to get people into new zones doing new things, there's no need for them to be the primary source of all exp and loot.
No one does quests just for the gold/exp rewards, it's the same thing really. It's pointless. And I'm struggling to see who needs 100k gold per bounty if you're smart and have saved up billions of gold already.
85 000 exp for a bounty? That's pathetic. That's not even a bonus, that's a joke. Remember that people get 150m exp / hour or more in D3 vanilla (probably more in RoS) if they hardcore grind, and bounties take quite a while to do.