Don't worry too much about that. They have already stated that they are willing to tweak it to make sure that subscribers aren't kept waiting for warzones. Here's the quote,
"Coldin: While Weekly Passes have been mentioned for accessing Warzones, Flashpoints, and Operations, is there any intention of letting players purchase a Monthly, or Multi-Month pass for that content? Or potentially allowing players to purchase unlocks that increase the number they can run per week?
Blaine: We think that the weekly pass gives players the best option for consuming the content they desire as a Free-to-Play player. Ultimately, if you find that you’re playing the content that much, we strongly recommend converting to a Subscriber – you’ll get more bang for your buck! Of course, if we see that the Weekly Passes are not working as well as we expect, we will continue adding more options or adjusting functionality."
...and the link,
http://www.swtor.com/community/showt...46#edit5340746.
I'm not saying their options are great. I'm just saying I can understand
some of them, and am willing to accept it for now. But, yes, they still suck.