I don't believe this has been posted yet, I did a quick search but wasn't able to come up with anything.
I got this idea when I was reading the PTR notes. Apparently, you're able to switch in a Tier 5 or Tier 6 token to get a piece of your class's Season 2 PVP set. Now, this may not seem significant at first, but consider this.
Try spending a Tier 5 token on a piece of Season 2 gear and then petitioning a Game Master to help you. Report you accidently spent a Tier Six token in order to get the item. If you get lucky, you might just get a free upgrade. If you don't, just claim ignorance and get your Tier 5 token back for no real risk.
Here's hoping it works for someone once 2.4 hits live.