I've said this already in another thread, so here's the short version.

Will you still be able to be landslided off the side in titan with echo? Yes.
Will you still have to drop the plume to protect yourself in Garuda Ex? Yes.
Will you still have handle conflags properly in Twintania? Yes.
Will you still be able to be knocked into a wall from divebombs? Yes.

Will you still have to observe the fights mechanics or wipe? Yes.

Echo buff is a nerf, I'm not saying it isn't. However, you will still have to learn the mechanics to win the fight. Once you know the mechanics, you're going to win the fight anyway. All the echo buff does is make it a bit faster, less prone to RNG, and lesser consequences from silly human errors.