That really is an awful challenge. I wish all the best to Eduardo and I hope he can recover and come back as good as before. About the tackle, I don't think he tried to hurt Eduardo badly, he wanted to stop the attack there, but made two things that made this happen. Firstly, he went in there with his studs up, you can't go in there like that, you're gonna get a red card if you don't get the ball 100%. Secondly, he timed the challenge really badly, he was way too late there and he knew it too, he could only get Eduardo, not the ball, and this is what happens...
He didn't mean to break Eduardo's leg, but I think FA should give him a long suspension and to pay the medical costs to Eduardo, to show some respect for Eduardo and also to show everybody, that if you tackle like that, the tackled guy isn't going to be the only one who's gonna take a rest of being on the pitch.