Just a thought here: When grading a commissioner and reviewing their work it is good to remember that while they have your measurements, they do not have you there for fine tuning and sizing details. It is not always the commissioners fault if it does not fit you great.
These are people who are working hard to give you what you ask for. Some are better than others at what they do, but it was your choice to work with them. If you really want something commissioned that works perfectly with you and is exactly what you want go with a local commissioner that you can work one on one with.
Even what you perceive as a bad commission might be wonderful compaired to others or in other people's oppinion. I think that when we get this deep into it you miss out on the whole point in cosplaying.