I notice that even when the dubbed version of an anime title or episode is released on home video, I notice it is still days or even weeks until the entire dubbed season or even the first 2 episodes are posted online and on demand.
I think just like Funimation, what should happen is that for dubs the anime should be posted and available to watch on the day it comes out on home video, or even earlier.
If that can happen, and also maybe there even be more dubs, and as a bonus, In-universe singing dubbed when possible, I be willing to subscribe.