I honestly don't think there's anything that's worth changing about it. Sure, the Availability gets high, but it's such a cheap item that you can just spread cash around until you get the materials you need.
For instance, let's say I start CharGen with a Force 6 Magical Lodge and want to upgrade it to a Force 12. The materials are a mere 3000 nuyen, but the availability is 24. My best contact for this is a Talismonger, who we'll say has 16 dice for finding things, so there's a deficit of 8 dice. If I spend 200% of the cost, then I've got those dice. So, for 9000 nuyen, 2-4 days of waiting and 12 days of attuning, I've got a Force 12 Magical Lodge.
Now, granted, getting anything above a Force 14 is going to be a pain in the butt and probably require you to sick two contacts on it ... but it's worth it, yeah?