Lets be honest though, if you get a manager from the Dutch or Portuguese League, what they do in those leagues tactically is close to irrelevant because those leagues have little to do with the top level. I mean, in the Eredivisie, 15 of the clubs would be around relegation spots in the Championship and they run less than bottom half Championship clubs as well. If you are a good manager in that league, you could do practically anything and be successful. I'm not all that convinced that what he has done at Feyenoord he would do at Liverpool. He says Guardiola is his biggest influence. That could just be a token line, but that doesn't jive with what we do. There is a chance he comes here and tries to play more controlled football because he will now have better technical players.
It would have been the same with Amorim. Maybe the 3 at the back thing he would always keep, but other than that, what he did at Sporting tactically has maybe nothing to do with what he would do in high level games in England with better players.
In truth, the important thing is that he comes with a specific way of playing, whatever it is, and isn't just some reactionary like Rodgers who said he had a style of football, then tried to play every different way under the sun to keep his job.