In short, I think the Porter Moogle system would be more useful/used if you didn't have to go to specific areas to access the Porter Moogle.
A simple idea to make them more "portable":
-Make all Storage Slips usable items.
-When used, summons a Porter Moogle in front of you for personal use.
Again, very simple. Steal the scripting from Magian Spectacles.
This would solve not only the problem of requiring to go find a Porter Moogle for gear, but also allow people to remember what pieces they have in storage to begin with!
Better notice this thread Camate, always ignoring me!