I ran into this with lowercase s and r. I couldn't make them look pretty when I modeled them on the exemplar. So I basically changed the lettershape into something I'd seen in other people's work that I liked more. If you can't make your B, R and E look nice when modeled on the exemplar (and I agree that those loops in B and R are tricky), then see if you can make them just look nice in your own style. After you play around and get a sense of what is harmonious and what seems to flow well--crucially, without becoming frustrated at the exemplar because you're designing your own letters-- you might find it easier to go back to the exemplar and identify the key elements there that were causing the original trouble, and fix it. Or you might decide that you like your own new forms better, and stick with them.