The end grain doesn't bother me. :
It doesn't trouble me either really...and with most solid woods it wouldn't look any different. But when you use Birdseye Maple the purpose is to show off the 'pattern'.
Why interrupt that pattern abruptly by using a butt joint and exposing the end grain?
It's not bad, I'm not saying that. But a mitered joint there (with that particular wood) would be outstanding. I like the beveled bottom too, excellent idea.