The book is getting better (the last issue was actually pretty good), but there still some serious improvement to be made, especially artwise. The art in the book is just sooo bland. The fill in artist for the last issue was way better than Tan's usual work. I'd put Rocafort on the book instead of Teen Titans. The arcs need to get shorter (how long have we been dealing with Durlans now?), and with more imaginative villains and supporting Lanterns.
The spectrum being a non-renewable resource needs to get cleared up quickly, because it just sucks out a large amount of appeal the GL universe used to have. Being a limitless superhero in a limitless world is a big reason why I like GL comics.
I think all these plot threads will get cleared up by September (or hope they do), and Venditti can move on to more space exploration and weird sci fi concepts.