Mouse wheel or individually clicking each set of high quality seeds requires 10 seconds and something on the order of 8 seconds of UI interaction. It's not great for me. If we could dump all, and select all back into the inventory in one click picking best Q seeds first (incase you dump multiple inventories of seeds into the same container for example), and then autoplant automatically chose highest quality seeds first. That would be tolerable. Some of that UI infrastructure exists in amber at least, dunno how much is vanilla.
However you lose the ability to use buckets without manually loading them (bad unless there's a functional autoloader for all of same type). And I've been hoping for a bucket+sickle combo for harvesting grain fields for a while now.
While we're on the topic of buckets, a take all option would be nice for filling your inventory with seeds.