Could have been better. Feedback must be detailed which must including comment on writing style, wrong usage of rules of the language etc. Merely editing a comma or two here and there is very basic proof reading.
In all fairness, I made 389 amendments to your document, and commas did not even make up 1% of them. I reworded sentences, made suggestions on structure, language, grammar, punctuation and vocabulary, and the wide variety of amendments, edits and suggestions I made are not fairly summarised by your feedback. Almost 400 amends =/= "editing a comma or two"!