I'm sort of on an island regarding this topic. My 'guess' is that the Ram's playbook is not only as full-featured as any other playbook in the NFL I suspect it's actually more complex. Too complex, to the point of being convoluted, actually. HOWEVER...
Fisher & Co's game strategy, despite the extremely rare 'trick play', is very basic and predictable. What they will do in any given situation, I believe, is predictable to a fault. While the play itself is probably typical of any of the 'offensively brilliant' teams in the NFL their use of the play is restricted to very limited circumstances that easily show up on tendency sheets.
Neutral Zone and it's 2nd and Long? They're doing "X". Red Zone on a 1st?... "X". 2nd and short? Player "X". Defenses can, certainly, stack or somehow give away that they know what's coming, in which case the Ram's would, or should, audible, but why would a defense do that? Let em' run it, they know where it's going and likely to whom.
I don't think Fisher & Co. are conservative in their wealth of plays and certainly not in run vs pass... it's in their own imposed limitation of plays they'll use in certain field positions, downs, quarters, time left in the game, etc. - JamesJM