Personally i don't see how the buffs duration is their weak point right now..
Then again im used to playing (most) mmos (out there), where you run around with a full set of buffs lasting (if your lucky) 7 minutes.

5-7 Minutes is actually a pretty long time for a buff you know.
Anything more then that quickly starts to move into the ''to long to bother looking if the icon is even there'' area.

If 5-7 minute buffs bother you so much, why not rather complain about debuffs..?
Although people forget about those often since they don't give a shiny icon next to your own status, they're actually as effective (often a lot more) as for example protect/shell.

But, if you have your mind set about complaining about those 2 buffs,
try complaining about their actual weak point, which isnt the duration, but the recast time.