Changing spell like abilities to require verbal and somatic components

[Remuko]

Ease of use? Why would I give them sorcerer casting?
I am not sure the whole point of spell like abilities is casting spells without somatic or verbal components. But you know, actually having access to the spell. Adding sorcerer casting would be more time consuming and would propably end up giving the monsters more spells known.

instead of making something new theres already something functional. yeah they might get more known, but you'd be the DM picking which ones they know, so it wouldnt affect their power level unless you wanted it to. but seriously the only real functional difference between a creature that casts spells as if it has sorcerer levels and one with SLA's is that one doesnt need components. Thats literally basically the only difference.