Never playing the game is not a bad thing (not necessarily saying it's a good thing either though). Jose Mourinho is a decent manager I suppose, and he never played professional football. Villas-Boas knows has more knowledge of tactics than Redknapp could dream of. His one, crucial fault at Chelsea was trying to implement his style of football too quickly. As a part of introducing his style, he needed to gradually phase out the likes of Terry, Lampard and to a lesser extent Drogba. Terry and Lampard are good players, no doubt, but Terry especially just doesn't fit the type of player AVB wanted. His style needs centre backs who are quick, good on the ball, and can slot in for the full back when they bomb forward - Terry can't really do that. At Spurs, we have Kaboul, who is pacey, and used to play RB, so could very easily slot in there when Walker bombs forward, and hopefully Vertonghen, who is a ball-playing, pacey CB, who plays LB for his country, so he could slot in for Benny too. Perfect. He also needs two wingers, who will score plenty of goals, but also drop in and help the midfield when the opposition have the ball. At Chelsea he had Mata and Sturridge. Mata was good for the role, but Sturridge barely tracked back at all, and as such, left the midfield and RB exposed. When you have Bosingwa at RB, this is a recipe for disaster. We would have Bale and Lennon. Bale tracks back more than any other winger I know, and has the engine to do it all day and all night. Lennon is also very good at this role, but he won't chip in with the goals AVB would want from a winger, so I imagine we would see a change here if he is our next manager.
I could go on, but I haven't got the time or the will to do it. Basically, if AVB came to Spurs, he wouldn't have the problems he faced at Chelsea, as we are ready made to suit his style with the personnel we have. Only slight tweaks would need to be made, not wholesale changes which he tried to implement at Chelsea. We are much more like Porto than Chelsea, and I do think he would work as our manager. We'll see.
That about sums it up. He may, in time, become a very good coach - may!! At the moment, he's a nobody with a grossly over hyped rep, IMO.