Oh, that makes sense. I think this is only the second year that they have tried to have all 30 teams playing on "opening day"?
I still suspect that it would add enough logistical complexity that they wouldn't want to bother with it, but you never know.
That got me thinking -- are there even enough stadiums to pull this off?
Roof: Milwaukee, Toronto, Seattle, Arizona, Texas, Houston, Tampa, Miami
Likely warm/dry-ish: San Diego, LA Dodgers, LA Angels, Atlanta
So they still come up 3 short, since 5/8 of the domed stadiums are already in warm climates. Maybe you can add the marginal ones like San Francisco, Kansas City, and St. Louis...maybe Baltimore/DC as well...but it's not unheard of to have bad weather in those locations at this time of year. And then you would have a ton of teams always starting their season on a west/southwest road trip.