I saw many posts indicating that bitcoin was not designed/intended for micro-payments, which I do not believe is completely accurate. Since bitcoin has a strong deflationary bias, the average transaction size will DECREASE with time, making payments today that we may consider micro-payments, be standard payments in the future.
When we talk about micro transactions we are talking about the purchasing power not necessarily the nominal units. Today the dust limit is ~5000 Satoshis worth about half a US penny. If the exchange rate rose to $5,000 the limit may fall to say 100 Satoshis still worth about half a US penny.
Case in point the min mandatory fee for low priority transactions (an anti DOS mechanism) has been reduced four times from 0.01 BTC to 0.0001 BTC over the years in light on
Regardless of the exchange rate Bitcoin is highly unlikely to be efficient for micro transactions (say transactions with a purchasing power equivalent to a few US pennies or less, circa 2012).
As for dealing with wallet dust, probably the easiest way to deal with this is simply to export the keys from any/all wallets and then import them back into one wallet to consolidate your dust. It may still result in a transaction fee but at least you can keep all your pennies in one jar.
That doesn't do anything.