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And what's about the option to resize directly, without going through the editing (always unlogged I talking)

Great!!... sorry, had not seen the option before

The ability to copy all links together is also not available. 

You can go to "First image", copy link and paste to destination, then go to "Second Image" and copy/paste it, and so on... but the idea was to have the ability to copy ALL links in one single step

Resize option IS NOT available. I know that it can be done by checking "Edit", but is not straightforward :-(

Yes, I know... but it's very tedious, is very difficult for newbies.

I mean to something direct, as the "Auto resize" option when you are logged in.

The option is not available when you are not logged in.
This is a required feature to adopt the service as the official image hoster for our forum.