I'm just being realistic. This team with this budget can't expect to have impact hitters at every position that also play average or better defense. They can, however, afford to have an impact hitter in LF, and if the CF defense is good enough that LFer can be slightly below average defensively. I also don't put as much weight on defensive WAR as some others, which is the main reason I'm not as high on guys like Heyward, Inciarte and Simmons as folks that preach WAR as the gospel. I do NOT think 2 dWAR is truly as valuable as 2 oWAR.
The reason being that defensive contributions do not stack indefinitely, while offensive contributions do. Elite defenders cancel each other out as they overlap their ranges, and as pitchers give up less hard contact. Example being a team full of Heywards, Simmonses, Machados, and Inciartes...guys that can post 30+ DRS values. Let's say you have 8 of those players in your lineup, would they combine for 240 runs saved? Absolutely not because many of Machado's chances to gain DRS would be stolen by Simmons, just like much of Heyward's DRS would be stolen by Inciarte, and vise versa. All of a sudden their DRS is lower, and then so is their WAR values. What if you put that team behind a rotation full of Kershaw's? Suddenly their DRS, and WAR values, go down even more. Meanwhile, they are still hitting like they they usually do (not a bad thing with Machado obviously).
The point is you need balance. Currently the Braves are balanced because they suck at everything, but when they intend to be good they will need some guys that can hit the ball and some guys that can catch the ball because it is unrealistic to have a roster full of guys that can do both with a $120M payroll.