Having the serve being a big advantage is an opinion. If you serve well and know how to place the ball with a return thats in your favor then ok. Overall I still believe being on the return end is more favorable. The player can literally just stand there and win a point if the pelota is over/underserved. The only advantage in muffing a ball is doing it when you have a lock feed situation. That I have seen numerous times and it makes sense.