It's uncertain when SW might go F2P status. DC Universe went F2P in under a year. Always possible that they will make the move within the same time. If anything, I'd keep a close eye on the developer's blogs, forums, and main websites. You will usually know around 3-6 months before they make the change. Might be prudent to wait. The game is bound to still have a lot of bugs that haven't been addressed since beta. Wait a month at least to play and see at that point if it's worth it from other players.
However, if you're a hardcore fan, Go for it. You'll love the game regardless of what people will say about it. I had STO since beta access and continue to love how they keep a good ear to the fans on what content to add or what kinds of bugs to fix. That's why I'm a major supporter of the game. They listen to the people who pay their salary on how to improve the game. It'd be awesome if SWtOR turns out the same way.