2 Hopefully quick adds/fixes
#1: https://forum-en.gw2archive.eu/forum/support/forum/Search-feature-not-working
#2: You can at least display the time of the last message with something like greasemonkey/tampermonkey:
div.topic > span.title > a.topic
holds a dataset value
data-last-message="2014-09-05T18:37:05Z"
see also: https://gist.github.com/codemasher/f8a367b2d202afcc201e#file-ws-forumtweak-js
(edited by smiley.1438)