I think we will always have the impulse towards visual poetry with us, and I wouldn't agree with Bly that it's a bad thing. It depends on the ability of the individual poet to do it well, and to make a shape which is interesting enough to hold your attention.
It's kind of a rule of thumb for me to self-doubt going into any kind of project. I always think that I shouldn't be doing it and I don't know how to do it and I'm going to fail and that I fooled them. I always try to find a way out.