Hi Chris ... your Syma does have a FC actually ... all it really means is Flight Controller - which is a board that takes in all data and control inputs to determine control of motors to achieve desired output ... Agreed that is does not the extras of GPS ... but its still an FC.
As to falling straight / level ... that all depends on weather conditions, attitude of model when CSC is performed, prop blades and position at stop, freewheeling of props etc. Finally if you have truly balanced AC ... I know mine is not because I have a mount for Soloshot on one side etc.
If you hang up a P3 from centre - you will find even out of box with battery in as designed - it is not truly balanced on centre. Therefore in a free fall - it will tip to the heavy side.
Nigel