Yes, shorten the first ferment if it's too sour for your taste.
I used to make tons but I'm not right now. My dh will occasionally buy the locally made 'buch. I'm the only one who will take care of it and I'm just not sure I want another living thing under my watch right now.
But it is so tasty on a nice summer day!
Flavors we've liked:
Strawberry rhubarb
grape (I use my homegrown concord grapes, I don't think store bought grapes would be very flavorful, but you could try concord grape juice)
lemon
strawberry
I gave away all my ez cap bottles, though. I suppose I could do a second ferment in mason jars. I like it plain, too.