Wow, I posted this a long time ago (about a year I think), I'm surprised to see it back up and a few other posting on it.
But at any rate, to update this a little. Energy bars in the party window may be a LITTLE less important due to having heroes, but even so, it's still the same old issue. I would really like it if Anet would add this. Your party's energy is NOT a secret (because you can ctrl click it to tell everyone) therefore adding this only takes away the step of having to yell at everyone to call energy. Honestly this really has no downsides and would make everything easier. (And not easier in a bad way) One way or another, I would like to know if Anet is going to put this in or not because I posted about it close to a year ago and still nothing. If Anet says they are NOT going to put this in, I would be highly dissapointed but at least it would give me some closer on the subject.