I figure they what everyone that uses the system to have to BUY or have their own key fob, if they had a keypad well everyone in the family could use the same one at the entry point. That's what I believe their logic is, what they should have is a rolling code that changes every time you use it like my auto alarm. This unit has been out I'm guessing about 12 years I remember when I got my first one cell phones were analog had antennas that had to be extended and wouldn't really work that well in cars. That gives you an idea how long it's been around and in all that time there's been no I repeat no changes to the console sure they improved the door/window sensors notice I didn't say motion detectors the old SP554 was in my opinion actually better detector at least in the 2 step mode you couldn't get past it and I never got any false alarms, it did have a much shorter range and the batter life was poor but like I said the 2 step mode was excellent. So there you have it my 4 cents!
Tom j