Then my question becomes why spend the licensing money in the first place?
It also needs to be kept in mind that Symphogear was one of the Funico (Funimation / Nico Nico joint venture) licenses.
Symphogear doesn't appear on the Roku app (and I suspect the same is true for the mobile apps), and it streams with ads here on the website even for those with those with an Elite subscription. Clearly the licensing for even the streaming version isn't typical.
Since no one simulcast the second series (despite apparent substantial interest), I suspect Nico Nico had some special "in" on licensing that US companies don't. Sadly, this means we can expect the same for the already-greenlit third series.