It's hard yes, but in reality, it's not that hard, most of us could learn these plays. Once you know each segment, x scat, z post etc. they are just being put in different sequences and a few other things being thrown in there like trips rt or lt, bunch, motions etc.. Complex yes, too complex, no way.
The hard part would be reading the defense correctly and altering your receiver sequence to make it work based on the defense you read at the start of the play, which changes after the play starts thus altering the plan that you already altered................now you're screwed if you don't have an Oline that can block long enough for you to alter the altered plan that was previously altered.