Why would design something to get smarter over time? It literally makes no sense.
Eventually those things will come to realize that serving humans is dumb because we're inferior to them physically. They'll eventually realize how easy it is for a human to be killed. You just know one of them will be mistreated and end up snapping and killing someone. Good luck trying to prove it though because these things will become so smart that hiding the evidence will be nothing to them.
The fact that they're trying to make them look like humans is

keep that shyt in science fiction.
Dude makes a joke about "Do you want to destroy humans?" Secretly that android is looking up information on how a human can be killed.