When I log in, there's a checkbox to remain logged in - do you not see that?
Personally, I like the 'somebody posted while you were typing' as I find it often avoids me duplicating someone else's response.
In the past, the mods have gone through and reorganized the forums, combining some, splitting out others, ensuring there's only one topic per lens in the lens gallery, etc. Perhaps some specific suggestions about what you think could be changed would help...