I'm also finishing a tactics testing league and I'm trying to be the most accurate as I can using also the in game editor but takes a **** lot of a time if you actually need to play each game... Let's say a 8 team league with 4 matches against each team... That will be like 112 games to watch...
When you go on holiday you can decide to keep using your tactics...so it should not change the roles? Am i wrong?
edit : looks like it is actually changing the roles since when i go to look the formation of an old game played by the assistant the icon for support-attack are actually different...