Umm... Force isn't useless at all. It's the MOST useful skill. Here are my reasons why:
1) Target heal: Definitely helps a lot in wars or PvP. At 69 mastery, it's max at 4.4k which is about the same as 2 XL HP pots does. Once new skills are out, you'll get the bounce heal which will heal TWO people for a lot (though -35% or so on the second, so I've heard).
2) Area cure: Preliminary translations have concluded that the 2nd book of this may be a therapy-type deal where you get +xxx immunity added to your pre-existing buffs.
3) Therapy: Helps when you need to go to the bathroom really urgently and don't want to get mobbed. Book 3 currently repels normal and champion mobs. Also, easy way to get your HP/MP back during caping if you don't want to waste pots. There are other uses for this.. which the force users in this forum will know and probably use. (You guys know what I'm talking about~

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4) VITAL SPOT: The most useful skill in the Force tree. Currently, you can stack 4 of each V.S. on your target, so two force-users will decimate anybody's parry and hit ratios to 0. Add to that the new skills which will reduce PDEF, MDEF, and PHY/MAG ATTACK POWER. Imagine 8 of each buff on you. There was even a PvP video of a nuker versus a glaiver. The nuker put one of each vital spot on the glaiver and... 2 nukes + 2 shouts later, glaiver was DEAD.
5) Self-heal: just jokingly.. gold bots use this

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