considering that the last 3 dungeons added can all be run fast in 12 min and avg around 20min. Not a single turn in the binding coil one takes longer then 15min, even with a death or two, Coil is relatively easy to tank, at least the first couple turns, and can be completed in under 8 min. however pulling a speed run is much more difficult, much more work, and about double the length to complete when compared to the 8 man content. In other words it is much more difficult/time consuming, and useful even for tanks to get points from the "expert mode" dungeons. This would also make it so that a tank gets "punished" for not completing a dungeon run, so if a player does decide to abuse the vote kick their actually just hurting them self. This would also cause an excess amount of tanks to be up an queing in df which would cause us to see more healers and dps bonuses. SE always has pretty bad logic.
I mean in FFXI "SE logic" was quite easily one of the most common phrases because SE has a really bad problem with foresight, like as we have seen really majorly in this patch with about 3 different things being postponed for no reason that will have drastic effects on the game make up, and yet se has no foresight to see what they did ahead of time, and are loosing scrubs and scratching their heads.still no word on the next ct which was supposed to be release b4 turn 6. and if they aren't going to put CT on schedule they need to adjust the plans for binding coil to not function as if CT exsist.