User blog comment:Rupert Giles/Global Navigation Update/@comment-10507735-20141203174136/@comment-1038387-20141203174724

In every case, there will be people that disagree with you. That first section of yours can be ignored, as it doesn't provide any actual arguments.

As for the rest:
 * Don't exaggerate. It's less than 2 times as high.
 * What won't collapse down?
 * How does it hijack your wiki's internal navigation?