Interesting. But the environment evolves in an opposite curve to us. The environment will drastically change one day, that's for sure. So the breathing underwater thing may be useful. Though, we have many natural predators to deal with.
And humans are evolving physically. Family genetics are slightly dying out. For example, someone with two fat parents could be skinny.
We humans are complex. We're gaining better sight and hearing. Senses...etc are improving to deal with our current tech and environment. We're also changing our metabolisms and diets. Lifespan is increasing. Alot of things are changing.
I like your idea of forced evolution. Though it would be a very expensive process, and would take twice as long as regular evolution. Especially for mammals like us.
And yeah. We would evolve to something else. Some people believe that soon, we'll be half the size we currently are (which can be backed up a little). But some people believe we'll be far taller than we currently are. It's hard to know. But we'll be far different than we are now.
The more I talk about it, the more I want to see what happens. D: