Getting Mining to level 7?

So by leveling up our professions, we get a special mining/harvesting tool that breaks and can't be repaired, a recipe that isn't all that special, a potion that has a lying description and can only be used once, and a pouch.

So basically the only thing worth getting is the pouch and everything else is crap. What an amazing event....

Does the pouch do anything besides adding 3 slots? If you put any value on your time it might be better to just go to cash shop and buy 8 slots for 6k (or whatever it is).