Cuadrado has been quite selfish and disjointed with his teammates at the moment. I was quite surprised that he popped up on the left side several times to try to make something happen. His decision-making has been quite off so far.
With regards to Falcao, he looks more energetic and sharper, but with Colombia not seeing much of the ball after the early pressure, he hasn't really been involved. Still, though, I wouldn't think of subbing him off, and at this moment, I think he may be able to make an impact in the match if Colombia does get a control of the match.
Speaking of control, ever since Valencia went off, Colombia lost all control of the match. Mejia has been more loose in his positioning and less aware of what's happening around him, and this could be why Colombia have struggled recently along with Cuadrado perfoming so badly.