Currently? Probably more than you would expect. Silva can beat guys at 185, but I think his greatest weapon, his reputation, has taken some hard hits after the Weidman fights. Silva defeated his opponents even before they got in the octagon with him to fight. His reputation scared guys to the point they were taken out of their game plan before Silva threw a single strike.
He taunted guys and made them lose faith in themselves. Just look at Griffin. He came out in an interview saying that Silva's taunts during their fights made him feel as if he didn't even belong in the octagon with him.
Now? Yeah, Silva's legend has been taken down a notch or two. Weidman made him look human. Whomever Silva faces when he eventually gets back will not be afraid, or as afraid, as he would have been before Silva's consecutive losses.
Then you have to consider the psychological impact of having your leg snap like a twig. Will Silva throw kicks like he used to? Will he be afraid if someone kicks that leg? I read an interview with Cory Hill, who had the same type of injury, and Hill said that he has to take pain meds on a regular basis. Mind you, Hill was hurt over two years ago, and he is still taking pain meds. Hill also mentioned that he thought guys wouldn't target his leg because of the injury, but instead he found that his opponents were purposefully targeting that leg. That has to affect you. Silva may be able to handle it, but you never know.