Suarez is only 25 is yet to hit reach his peak but he's already on-a-par or even better than RVP(who is easily at his peak right now).He's much clever with the ball and easily a better dribbler. Last season was his first for Liverpool and it's always going to be difficult to settle in to the PL, but still it was far from disastrous. How many seasons did it even take for RVP to perform consistently, if at all, he's being consistent only in the past 3 seasons. Why don't you go have look on that stats of his first 4 seasons.
Suarez has achieved more than what RVP has by his age, both at club and Interantional level. I definitely rate him better than RVP and he could only get better.
And about the big clubs not in for him is more to do with his willingness to stay in Liverpool, he has barely shown any signs about being unhappy there. And they all know Liverpool is not really a selling club, and even if they do, they make sure they get 50 million. It's not like Arsenal you know