I’m in Bologna just now and reading the local media it appears to be a done deal. They are quoting €5 million (euro remember not pounds) but with added extras including a sell on clause for Motherwell - doesn’t mention the % but does say a further fee will be due if hit certain number of Serie A appearances before the 26-27 campaign.
Torino would definitely be the preferred option if you asked my opinion (likely to play as a 10 there and feed some excellent strikers) - more suited clubs for him would be a Fiorentina or Verona looking at their squads but doesn’t appear to be working out that way. Much as I hate to say it I could see him playing as an 8 at Lazio but may be tougher to hit the 30-40 games a season he would expect
After the success of McTominay, Gilmour, Ferguson, Adams, Doig and Henderson previously Italian teams are keen on “Fortissimo” Scottish players. As someone who lives in the country and follows the league closely I would be very surprised if Miller isn’t also living here soon.