I already said one-time ring signatures are an improvement, except they come at the cost of defeating the mini-block chain, which is the only way I can see to scale to micro transactions and remain decentralized (assuming you want new mining nodes to be able to pop up, download the block chain, and leave the network at-will to guard against IP blocking by the authorities, etc...).
I would urge you to think of the idea of intentionally living with a rigid or punitively expensive cap of daily transactions.
The transaction cost for physical gold bullion transactions is always 1% or more of the value, typically 2% (not counting all the externalities such as your time).
I am in favor of drastically increasing the price of something that is rare and valuable, and would not even notice paying 1 XMR fees.