If you only care about que time and not hard into raiding or RP, I can confidently say that you can still pick Aether or Crystal. If you don't care about RP you'll quickly learn what areas to avoid on Crystal and the only weird thing about Aether to me is that there seems to me more FC recruitment spam than other data centers. But I do have to admit, both Data Centers seem to have an noticeable increase in que times during off hours over the past couple of months. Hopefully it picks back up with all the changes coming in the next patch.