Your process sounds pretty effective to me, especially for a shop with 4 people. I've also only really got experience working with smaller teams. The only thing

Your process sounds pretty effective to me, especially for a shop with 4 people. I've also only really got experience working with smaller teams. The only thing I would say I do differently before I commit to any ideas and wireframe is to ask everyone part of the team what they think, especially if they are not developers.