Do you think a group summon ability would help people be more willing to form groups?
I know there is a segment of the population who rarely partake in group quests. How large that segment is depends on a lot of factors like server population, planet population, etc. I don't really see people saying that they don't do them because they suck/are bad/not fun/etc...but many people are open about the fact that they do not enjoy the time it takes getting to/from the group quest area.
If you are off questing somewhere on a planet and answer the call to join a group you usually have to:
-leave an area you might have spent a while fighting your way to
-quick travel and/or flight point your way to the closest area to where the group quest is
-run/fight some more just to get to the starting area for the group quest
-fight your way back to where you left off when the group quest is done
There is A LOT of group content in this game but I'd bet most people don't even bother with it because of the time it takes just to get the process started. My suggestion would be a "Group Summon" ability:
1. Summons party members to the location of the summoner.
2. Places the player back in the area where they left off once the player leaves the group or the group is disbanded (similar to how WZs currently work).
3. Have some sort of CD (2 hours?) so people aren't abusing it for World PVP.