I think the rivers look in general better now. There's a little icon in CC (I don't have a copy at work) that looks like a line with a point on it. If you click it while drawing your rivers (or roads or whatever) and then the line you want it to connect to it will "stick".

Something else I noticed is that your tributaries to the "main rivers" look a bit off in that their direction seems to go against the flow of the main body (i.e. the main river goes to left, and the river flowing into it goes to the right) which is rather unusual in real life.