I just pushed a new gameplan Rex engine - when you click on the recommend button you will get a list of checkboxes to choose which parts of your gameplan you want to rex. Also, the logic is improved and takes into account your personnel as well as your upcoming opponent's personnel when setting the weights for play type and personnel. This also fixes the bug where the scouting was deleted when you rex'd your gameplan.
Let me know if anyone experiences any issues with it!