Without more hitting the Braves aren't going to do anything this year.
Also, I'm not sure why you are down on our pitching staff. Wood and Teheran went toe to toe with Greinke and Kershaw.
Also, the Braves didn't "do nothing". Their biggest weaknesses are LHP in the bullpen and their absurdly awful bench. They made a trade that will hopefully address both those needs.
Are the Braves a perfect team? No, they will most likely need to fight for the last Wild Card spot but right now there are only two teams in the NL that have more wins than the Braves.
It doesn't make sense to blow up the team or give away our future to possibly improve our top 10 pitching staff a little bit.