The majority of Ottoneu Football players also play Ottoneu Baseball, which is why the arb window is a little longer.
You also kind of want free agency to be completed within the arbitration window, as it has the largest impact on player valuation.
I’ll consider changing the arbitration window around next year, but trading during arbitration or ending arbitration early are both off the table due to the mechanics of arbitration and the goals of community building that were already mentioned here: