I would actually be okay with that, I like deserts. I mean over all I'd like a variety but there's a lot of fun islands and that far east green area looks interesting.My first thought heads toward climate with that amount of land mass. I've probably forgotten more than I know about such things since I haven't dealt with it for years, but my immediate impression is there would be a lot of brown for deserts.
And update to pmmg, also: I added the rivers you suggested feeding the one lake and used to height editor to lower the area where the other lake is. I ultimately connected the tiny lake and the bigger one to the right of it, but I like it. I'll re-upload my stuff to the gallery as I change it.