I am planning on building a utxo privacy analyzer, where you can select a series of privacy metrics to analyze a transaction by.  The result will then say if the utxos included in the transaction passed or failed the various privacy metrics.

A few privacy metrics to watch for I have so far are, 
    - number of consecutive coinjoin rounds that a utxo came from. 
    - choose your anonymity set, aka how many txs should look like yours (aka equal output) in a tx.
    - No change. 
    - no small change.
    - no reused addresses
    - reveal least amount of wealth
    - reveal least amount of past tx history, aka don't combine utxos, especially not change outputs.
    - don't mix post mixes (or any post mix tx change) from different rounds.
    - don't mix postmix (or any post mix tx change) and non mixed.
   - reduce change detection
      - no round number payments.
      - no same script type for the inputs and only one output.
      - largest output amount heuristic (this is weak)
      - spending to an exchange, it is obvious you are the change
      - break the unnecessary input heuristic.
      - more than one change output.
      - change output should be of similar size of payment
    - no dust attacked coins.
    - break the common input ownership heuristic.
    - break volume or other pattern recognition analysise.
      - the change should not always be in the same output position.
      - timing analysis, make sure you are not always receiving transactions on the same day.
    - make sure do not spend utxos are not spent
    - no kyc coins. 


Does that sound like a useful tool to you?