I have seen that and I'm not terribly optimistic. Smallville was fun for a while, but never very good. I have heard Arrow is basically Smallville mixed with Nolan's Batman.
We don't have the CW as part of our satellite package (simply amazing considering how many channels we do have). I would add it if a WW show gets on the air. Although the premise sounds less than inspiring. My understanding is it would take place before Diana becomes WW.
I would have thought you would get the CW, considering isn't it a basic channel (along with ABC, CBS, NBC, FOX, and is it PBS, ION and MyNetworkTV? I don't know, I'm not from the US), but I think that I have read that it may not be available everywhere, for some reason.
I watched Smallville (for some reason, for me, the even numbered seasons 4, 6, 8, 10 were better than the odd numbered seasons 5, 7, 9 - I watched 1-3 in reruns, so I don't know which episodes were from which season).
I watch Arrow as well, and it has gotten better as the season went on, and I would probably say that it is better than Smallville was, but there are still some parts of it that just seem silly.