Doombawkz
Trust me, I'm a doctor
I agreed with that right below where you quoted, saying I don't feel every character needs all of the tools. Personally I don't see too much trouble with Cage, but thats just me.Forward movement leads to 50/50 mix ups and pressure, which is what Mortal Kombat X revolves around. The risk of running is almost always worth the reward.
The point is that offense is currently extremely strong in Mortal Kombat X. Watch any grand finals of any major off-line event for evidence. Is buffing backdashes the absolute answer? I am not sure, but I believe that defense does need some type of buff.
For example, most of the top tier strategies that the community complains about (i.e., D'Vorah's f+1,1,2 xx GWC pressure, Erron Black's 2,1,1,2,2 pressure, Johnny Cage's b+1,2 pressure, Kung Lao's EX hat spin pressure, Quan Chi's EX rune pressure, etc.) can be fixed by reducing the resources of a block breaker rather than tediously normalizing the block frame advantage of every move.
Reducing the cost of block breaker to 1 wouldn't be too bad of an idea, but I think I would rather see it simply cost half as much stamina rather than half as much meter.