So exactly how does that home team do when they take the first two on the road ? They do ok, for all rounds it's hitting at 51.5%. For the Semifinals round it's just not enough data yet, only 18 games. But if we ignore win or site order the percentages are pretty much the same so I think all the data is solid.
So at -115 the line is pretty much spot on, the home team would have to win at a 53.4 rate. So actually outpacing the historical percentage. Probably not enough to hang your hat on for a wager though.