Getting fruit right can be tough. I made a strong ale (8.6 ABV) that tasted amazing. I split the batch and put 4lbs blackberries in 2.5 gals. It came out hazy-purple, all you could taste was the berries with a weird bitter aftertaste. They completely overpowered the strong ale.
Next time, I'll mash higher for more residual sweetness, cut the berries in half and use pectic enzyme to help it clear.