So I managed to do this with 4 friends last night and right after helped another 4 people get the datacron while we were still in the room. Since /stuck doesn't help the people near the buttons, it was an exercise in frustration trying to get everyone into position.
A few things that we discovered that helped us is that jedi guardians can use guardian leap to reach various positions. A guardian can leap back up from panels A,B and C if someone is on the walkway below grapple point 3. A guardian can also leap up to grapple point 3 if someone is already up there and from there can leap to panel E. A guardian can then leap to the final door from panel E, they can also leap from the walkway below grapple point 3 all the way up to the datacron door. (I hope this isn't getting too confusing) Finally a guardian can completely bypass the bridge by leaping to someone at panel A, from there they can leap up to someone below grapple point 3 or to someone at panel E.
We had 2 guardians in our group, I was one of them, so with liberal use of guardian leap both the guardians got up to the datacron. The other group that joined us had 2 sages, so we got one of them to the door and the other to panel E from there they would "piggy back" everyone up to the door with their ally pull power.
TL;DR version:
The best work around we found is to use a sage's ally pull and a guardian's guardian leap to make reaching all the platforms easier.
