Well, luckily for those who have fallen behind in terms of gear, 2.3 offers FANTASTIC opportunities to close the gap. All you have to do is run ZA and kara, and youre almost back on par with the tier 5ers. Between ZA loot, and new heroic badge gear, you'll be in good shape, and up to snuff in just a couple weeks.
So take heart people! Don't be afraid that you wont have a spot just because you're a few steps back on gear. Little bit of work, youre right back in the thick of it.