To be fair, I'm still on normal. Things could go sour when I get to cruel and merciless. Also, if I'm not careful elemental enemies will do a great deal of damage, especially fire mobs. Investing in resistances is my next goal after life.
Doing a lot of damage is another another "defensive" aspect of my brawler. As stated in the BotW video, being able to take out normal mobs in 1 to 3 hits is crucial. I'm sure my survivability would go down if they made it so quivers only affect bows.
I would suggest planning out your build before hand, and possibly looking into established builds before tinkering around with the tree to make your own.