From the news:
One of the effects of the updated economic rules has been a temporary increase in the amount of money in the game, particularly in one-time payments from arena contraction.
(The global increase in merchandising money under the new rules is approximately in balance with the global increase in salaries this offseason).
I think you forgot for one very very important think. Almost all of team now earns more money for gate receipts than last season. For example my team has maximum last season 555k for a game, now is 606k and I think I'm able to raise it somewhere up to 650k by setting optimal ticket prices. I ask many teams in my countries and it looks all team are able to earn some 20k-30k more than last season with the same arena. If I count over 50k teams playing BB it is about $ 1.000.000.000 - 1.500.000.000 more in game every week (at the start of the season it wasn't so much, because it took some time to set the ticket prices well).
I'm not sure you know about this effect of new attendance formula.
You also mentioned arena destruction, but I can't believe it's in sum more than $ 500M, there are not so many team which have too large arenas.