I would like to make a list with skills the posters think are useless, and the reasons why. Both so we may learn with each other (a skill I think is useless could actually be useful in a way I haven't thought about), and both so we could give focused feedback to Arena Net about what to improve.
I would like to follow more or less the format:
Skill name (with the description, if you feel like adding it)
Mode you are talking about (I'm talking about PvE, since that's all I play, for example)
Why do you think the skill is useless
Suggestions on how to fix it
(If your list would be too big and you don't have that much free time, I would suggest posting only a few at a time )
Here's some of mine:
"Can't Touch This!": Shout. For 20 seconds, the next 1..4..5 touch Skills used against you fail. 10 energy cost, 20 seconds recharge.
Game mode: PvE
The skill is too limited. Even when against enemies that use touch skills (that are not that common in the first place), protecting only yourself against skills that do little for such a high energy cost is not worth it.
I would suggest changing it so it works for the entire party, decreasing the duration to 10 seconds (so it would not be up all the time), or changing it so the touch skills fail and the user also takes damage. Even then this skill would still be flawed, though - it's the kind of skill I like the least, one that is "useful" if you are against some very specific kind of oponent and useless otherwise.
"Make Haste!": Shout. For 5..17..20 seconds, target other ally moves 33% faster. This skill ends if that ally successfully hits with an attack. 5 energy cost, 10 seconds recharge.
"Lead the Way!": Shout. Target ally moves 25% faster for 1..4..5 seconds for each ally within earshot (maximum 20 seconds). 10 energy, 8 seconds recharge.
Game mode: PvE
Both have the same problem. In PvE, often it's actually dangerous to have some moving faster than the rest of your team - you risk leaving the "runner" outside of the range or healers. Even in conditions in which you could separate a "runner" from the team (such as when tanking to draw aggro), there is no point for a speed buff. The only condition in which this would be useful is to help casters kite when under attack of melee enemies, a help that is only needed in Hard Mode, where the enemies already move faster anyway, and where other kinds of defense are better.
Those skills need to be changed so they are more suited for defense, IMO. I believe they should have a % to block attacks, making them actually useful when used on an ally who's trying to kite. They would need to have their duration reduced and/or recharge increased so this effect cannot be kept forever, though.