Even if you had a remote shred of evidence to support your opinion, the way you've presented it is entirely useless and only serves to be degrading. If you're irritated by the lack of thoughts behind the mapper's updates, say so! Don't try and act smugly superior about your mapping ability, especially when you have very little to show for yourself.
Whoa whoa whoooaa
I am no pro in saying things as politely as possible in which any of our staff is quite good, and never am I intentionally smugly superior about my mapping skills despite hammer skills (a little different thing) of mine being, well, better than a very beginner's. Let me rephrase my opinion as you said it: irritated by lack of thought behind updates.
About evidence... Well, how he did behave with some previous maps, some were "final" sespite needing serious improvement.
Edit: little to show myself sentence is somewhat right, yes I can run into problems other than unability to do X in hammer releasing a map. but it's a problem if i was smugle superior, which I did not even meaning to be, trying my best not to offend.
Uselessness? If the mapper agrees, he'll be doing his updates closer to the right system, which is an improvement. Being "irritated by lack of thought" means nothing for mapper than they do it wrong, and may even offend them despite overall polite-looking of the phrase.