RE: lack of control
personally I reckon if ya a re going to the trouble of replacing the radio system you might as well swap out the servos too. But I suppose it comes down to $$ and what you can afford. Replacing the radio without the servos is still going to be a vast improvement over the stock system. But if you were to replace the servos get some heavy duty metal geared servos for an awesome setup. The difference will amaze you.