Purchase another Blizzard expansion (for $40) that contains no game time and requires purchase of ($15/month, $30 card for 2) just to even come BACK to the game to see whether or not it's worth it....
OR...
Paying for a single month ($15) to go back to EVE Online with it's FREE expansions and not worry about any extra costs.
The LEAST Blizzard could have done was added some game time to the expansion, whether it be 30-days or whatever. But no, they don't do much but a few graphical changes on already existing maps, make a few already existing models as playable races (Goblins and Wargen), and added a few same-model dungeons (notice how many of the last expansion's feature skins shared a lot in common with already existing things, such as gear sets, creatures, flora and fauna).
Where's the worth?