I have suggestions about the show title on Google Search. if short title thread then titlebar will be displayed and if long title thread titlebar will be remove.
This is title thread XenForo Default:
This is title thread XenForo after change:
P/s: if you have used to Wordpress SEO by Yoast plugin you will see this function. Thank you, i hope will be see it on XenForo 1.5 release!