I mean, it makes some sense on paper. I'm just wondering whether there are enough quality pitchers who can fulfill the swing man/110-inning role to make it actually work.
If you have two regular starter roles that can bring you on average 190 innings, and, say, five short relief roles that can average 75 innings, that would mean you'd need six swing roles averaging 115 innings to split the remaining starts and do long and the occasional middle relief outing. That would get you the 1,450 innings you need to compete for a whole season.
I think the trick here is to find more than six pitchers in your system who can effectively fulfill the swing man role, because you're not going to have the same six guys all year. So you might need maybe ten or twelve, in addition to four or five or so who can do the starter roles, and the ten to twelve or so you'll need for your short guys. I do think a sticking point will be finding guys who will be comfortable in a swing role, in which they start on an infrequent and nonscheduled basis but also might relieve anywhere from three hitters to several innings on others, and pitchers, being creature of habit, might chafe. They'd have to buy in.