Hello Cesar. Requip can make you feel much better UP TO A POINT. But unless you find the right amount of mg's and don't exceed that amount, Requip can make your symptoms worse - especially tremor and balance.
After almost six years of taking Requip, I have found that 8.5 mg per day do more for me than the 12mg per day I took three years ago. You might try to reduce your daily dose of Requip and see what happens. Reduce by only .50 mg per day (not per dose) and wait a week before you cut out another .50mg. That gives you time to see which amount helps - or not.
I have not tried Mirapex, but reducing Requip is certainly easier than switching.
Good luck,

birte