Exactly my thoughts for some time..
The unit I have is called FY31AP, and I use it in a FPV plane. It`s a state of the art unit, as good as thing gets today.

This unit have several useful functions for us. It marks the GPS location at start-up and set this as "home", and if transmitter signals are lost, it comes back all by itself.
You also have 3 axis gyro stabilizer and return to home by a three-way switch set up on the transmitter. Meaning you can take it home by flipping the switch (if it`s lost in sight)
When return to home, it starts cirkling in a wide cirkle when it gets there (you are at center) waiting for your further command.
To program waypoints with Goole-Earth (up to eight) is not the part we choose of course, but it`s able to do so.
But again, the unit has to be placed at CG, and serves one servo for aileron and elevator. Y-lead is a way to go, not sure about the current capability.

This is what advanced RECEIVERS SHOULD have as standard in near future. Never a lost plane again.