Last 4 look good. The top ones have exposer problems, & no "pop". When shooting running water, slow down the shutter to add some drama. Instead of taking in the whole scene, try to focus on one subject.
Like the 4th one down, it would be a good shot, if you set EV up just a tad, slowed down the shutter to make the water look like it's running & got closer to the falls.
X2 on slowing down the shutter speed it will show the motion of the water better...also the last 2 shots of the water seemed kind of dark to me i dont know it maybe my computer screen but just a tad dark other wise i like the flower shots did you do those with the 50mm?
how do you like to 24-70 im about to pick up one myself
Your not invincible