They'll be too busy getting rich to worry about the mice. A rodent with an improved memory will not only remember that someone tried to kill him with a broom, but also exactly who it was. At night, he will return for revenge. Enhancement of intelligence leads to greater capacity for evil. I would be a lot more worried if science had created Rat Einsteins, but I have some concern that the genetic traits engineered in mice will get spread to the rats.
Rats are nasty and evil.
They carry the plague. They are already too smart and too big. A mouse in the house is grounds to call an exterminator, but a rat in your house is reason to move. I hope the labs with the genetically engineered mice have good security, but a smarter mouse is a mouse that will find a way to escape, after which it will do what mice do best - reproduce. Then there will be hundreds of generations of smarter mice before the first generation of smarter humans.