That should work fine. Charge, Intervene and Intercept are exceptions to the general rule that you can't fit more than one GCD-invoking ability into a single macro. If you are too close to charge or intercept, it will use hamstring.
Using the "[modifier:alt]" parameter I have one button that fits Charge, Intercept, Devastate and Hamstring all onto one button (Shield Block replaces Hamstring in Defensive stance). It's very handy if you can fit the bulk of your most-used abilities onto the 1-4 keys since they're very easy to reach while running/strafing.
Add in the remapping of A and D to be hotkeys instead of turning, and you've got quite a few abilities in easy reach.