In my review of the Eachine Falcon 210, I concluded that it had a terrible camera and ESCs, and that you should not buy it. If you already have bought it, though, here are some tips to slightly improve it. I still say that the single biggest thing you could do to improve it is put some good ESCs on it. The next biggest thing you can do is put a decent camera on it. The camera side-plates seem to have mounting holes for an 1177 style camera, which suggests it should be possible to use one, although you would probably have to change out the plug.
My original review of the Falcon 210 is here: