Yeah I tought of making smackdown a minor show. My fear is having too much people on one roster, having people never compete.
Will be both rosters working on both shows. They will mix. So will be just the same I believe. Though if you have a Minor show, even if it has 7 matches same as a Major, then atleast it should use different stars that did not appear on the main show. Where as Main show and Main show, could get same fights. Just speculation have not tested myself.
To be the Man, You have to beat the Man! WOOooooo! It's called Wrestling, not "Fighting with Hedge clippers"
It's doable but pointless as the rosters will mix because everyone is in the same title hunt and that's how most matches are booked, so it'd be almost the same as having a major and a minor(you'd actually get more variety with a minor if it's set later in the week as the major as they pull in different people that didn't fight on the major that week).
One workaround is to have just one major title and set very few people(maybe 5 from each show) in that chase so the crossover will be minimal but keep two minor titles. You can do this by going into the edit wrestler screen and going to the championship tab and pressing X to turn on and off who chases what title.
You can also do this with tag teams and have them only chase the tag titles and have no singles wrestlers chase the tag titles.
Another fix is to just edit the card whenever the rosters mix. That will get tedious though.
As for PPVs, you can have them for one or two majors. So if you want you can add a 2nd PPV each month for the second major, or alternate which major gets the PPV each month(and can have them share some).