Changing spell like abilities to require verbal and somatic components

[VladtheLad]

if youre going to do this whats the point of spell like abilities? why not just give them casting like sorcerer's and give them the spells from their spell like abilities as their spells known?

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.