They're certainly not trash. It's true that Kite Shields mitigate a little more damage, but Bucklers smooth out damage spikes.
In this game, it's not average damage taken over time that usually kills a geared tank. It's damage spikes.
Not saying Bucklers are better than Kite Shields because that's just not true. However, Bucklers do have a place in some fights. It's just a shame there isn't a 130 or 135 version of a buckler at the moment.
Here's a sample video of True Ice Shield at work:
http://www.twitch.tv/saifujiwara/c/5489930
You can pretty much solo tank the T11 boss besides the forced tank swap. This trivializes the fight as it makes healing fairly easy on a solo tank and your OT can just go into full DPS mode without having to worry about when Resonance is coming.
