I would never use simple syrup in a Margarita - subbed with agave, but I would probably ease off to 10 ml with it... I used Lunazul and Luxardo Triplum and just did a shake and dump with ice crushed in a Lewis bag. The specs here are pretty spot on. A crowd pleaser.
Question? Shoudent have more Tequila than a regular (shaked) Margarita? Ice reduces the alcohol perception and frozem dooms the sweeteness perception. Right?