Guild Wars 2

Basically : Ability to group as a Guild Team, with members visible on the map, up to maybe 20 people.

For making groups not Zerg based, but Guild based, for PvE and WvW.

Invisibility option for commanders would be nice/enough/better… IMHO

one reason would be that our alliance is split into two guilds… so we have a) more than 20 players and b) not one but two guild teams(?) (reasons: influence, buffs, two towers to own, …)

second reason: could be abused if not implemented the right way – e.g. 20 players in the same dungeon…
should be normal group (see position, health, conditions, … can go into the same instance)
and a “raid group” a group of groups (see the positions)

third reason: more information for the server to process and to send
player x is with player y in a raid group —> send each of them the position of the other one – even when they are not near each other…
group of 5: each player needs the coordinates of the other players 5*4 positions will be send (if we assume that the server will not send you your own position, +1 for each correction that has to be made – we ignore that)
group of 20: 20*19 positions – 19x more than before
group of 50 (not enough for a run with e.g. [Rose]): 2450 positions = 122x more than with 5 players

an alternative idea:
new option to set your commander invisible to “normal players” (so they don’t follow you and the “big zerg” commander will not argue about whether you should switch it off/can keep it on)
only your group (so they can follow you) and other commanders (so they don’t bump into you because they go for the same targets) can see you…

another icon (color?) for the “invisible marker” would be nice… so the “zerg commander” can see who forgot to switch to invisible…

improvement for your idea:
marking guild members (close to you) in another color on the minimap
(group = blue, guild = orange/red/yellow/…)
this way only the client has to be changed (not the server) and the server does not need to send more information to all the clients in these “raid groups”

not perfect: range is quite low, so you will not be able to see your groups everywhere…

I think all guild members on the map you are currently on should be visible as a gold dot anyway. I think it would really encourage guild group play.