if we implement auxpow with btc we wouldn't have to sacrifice the 3-minute-blocks or would we?
This auxpow is does not exist (yet). I am not a fan of auxpow off the BTC network. Because that means we give up on the 'Fair' part of Uno. I suggest creating something that lets others tap into Aux Uno.
option 1 -uno auxpow with btc and other coins auxpow with uno
That's the general idea
Focus on "auxpow with uno"
1. setup other coins auxpow with uno ("an plugin" that they implement into their code)
2. much later (and only if needed) uno forks 2 get auxpow with the btc network
3. if UNO forks to have the Auxpow-like-Via then any pool can mine UNO (bitcoin pools too).
But I whisper this ... We invent auxpow sha256 ... test it on some other coins ... wait watch until uno makes 2 more halves ... and if it is all good then fine okay ... AuxPow into the Towers of Sauron.