According to so many topics regarding phpDoc comments implementation in PhpED, following scheme "different topic, different person, different phpdoc formatting opinion" it would be great feature to have user-customizable phpdoc autocompletion.

What do you think?

I think you can modify the "phpdoctags.cfg" file in the config directory. I don't know if that is also used for autocompletion, but logic dictates it is.
Perhaps that helps

That's not what I had in mind.

I was thinking indenting second and subsequent rows of the comment with additional space (as mentioned in at least two other threads), and also automatically inserted text "...put your description there", which was introduced in 5.5 and which I quite dislike