You won't regret the sour crinkle. Three plants so far, and all are champions.
As far as leaving in sweeteners.
Since they typically, like bud candy, honey chome.. advanced, and emerald harvest sweeteners. Are typically magnesium in instantly available form, with secondary vitamins, for carbs... can't see that being toooo heavy to leave in regiment. Especially if you keep microbe levels up. I do use Mammoth P as well. Which is also used throughout flush. And those sweeteners will definitely keep those bennies active. Which in turn keeps feeding, while plant is working through excess metals, npk etc... without cannibalizing herself...
Just my experience... im definitely still learning.