What's your roster management strategy after the introduction of GA?

To my mind, the description of "sandbagging" doesn't fit the most effective roster build strategy for the current state of the game. With TW and GA in the mix, low-gear characters hurt the progress of the individual and the guild, so it is pointless to start a build unless you go all-in to max gear, and as fast as possible.

So now I am focusing on g12 for most everything I once left at g11, and everything I left at g10 is now a liability so they are next, too. The new stuff? Unless it's OP (like Revan), it gets ignored. Is that sandbagging or just playing the game they way it needs to be played?