By offering a nav mesh to a level designer, even in the manner described by you, nav mesh editor gives him/her 3 options:
1. do nothing and leave some players (I agree - small minority) discriminated and unhappy, because a level with auto-generated nav mesh is usually unplayable with bots.
2. implement the offered nav mesh direclty (possibly working with nav mesh editor if some changes or place names painiting is required).
3. do not use the offered nav mesh directly, but instead review it, and learn more about nav mesh editing by making the nav mesh himself/herself, using the offered nav mesh as a kind of tutorial.
The third option is the most desirable from my point of view. I would love to get all those nice maps from Workshop ready to use and avoid spending tens/hundreds? of hours correcting all those nav meshes.
In case of second option (and maybe sometimes - third too) a credit for a nav mesh editor is a nice thing to remember.

No problem, I always have appropriate respect for level designers.
IMO, while ham5 does't beat around the bush and tells straight, he has a good working knowlegde of nav meshes and is a nav mesh file size optimization specialist (decreases of NPC-related CPU load).

@tomgor, sorry I did have you mistaken with ham5.

Well I cant understand why people get rubbed so easy. I really do not mean to offend, but I would not try to add someone as a friend directly because of something like this. I think posting on the maps page is best. You did add me... and used the nav... You did not seem that rubbed then...

How can I word the subject any better? I do try to be polite and offer help in the post itself. If I have already made changes thats up to you to have a look. And you defintly dont have pack it in your map... but if I run a map on a server I'm going to run my NAV now and not wait.

Bad nav mesh makes even the best map useless for me, and this is not a uncommon problem. And I don't think I am alone. A critical but constructive comment on nav mesh issues should never made any lever designer offended.

You must have mistaken me with someone else. I have always very politely pointed out issues with nav mesh first and tried to contact level designer to offer my help. Only in certain cases, where no response was received from a designer and the original nav mesh was really bad, I decided to publish a tweaked nav mesh map on Workshop. After I had put quite an effort into my work of editing the nav mesh I simply did not want to keep the result only to myself and wanted to share it with others. The classic example here is Tanuki and Seaside. Great map and horrible nav mesh. No response from Tanuki despite several attempts. Such a great map deserved a better nav mesh. But I agree that sharing my work by publishing a map with tweaked nav version may have not been the best solution.

Perhaps you should ask the level designer if they'd like your assitance instead of posting the thread saying "bad nav mesh!" preceeding by you just fixing a nav mesh. It can very easily rub someone the wrong way.