What do you mean "catch up"?
For those players who care about Beast Tribes in the first place, the sensible option is to do each set of them as you level up. That way you will never have a lot of Beast Tribes active at the same time, and have no need to catch up with anything.
By this I mean that one would finish all the ARR Beast Tribes before even getting so far as to unlock the HW ones, and finish the HW Beast Tribes before unlocking the SB tribes, etc.
As long as one puts effort into the Beast Tribe quests, and do not rush the MSQ, this is perfectly viable.
