But how exactly should they change it? Changing only the color of the tethers wouldn't work for obvious color blind reason that every other tether mechanic in a raid setting used to be plagued with. So they'd need to implement an entirely different tether graphic that would be instantly distinguishable from the current one.

The difficulty in the mechanic is finding the person you're attached to, looking at both of your symbols, and both of you making the correct decision on how to move. If the tethers were changed so that matching symbols had 1 type of tether and differing symbols had a different tether, then the mechanic would be simplified to look at tether, run to center of room or perimeter. I understand there's still trajectory to worry about if you have matching ones, but as long as one person stands still and one is designated to do the lining up, no worries.

I can sympathize with you on the names and symbols blocking as I had to deal with that learning A3, but changing the game settings to show initials instead of full names helps, having the group spread out more helps (shouldn't all be clustered under the jiggly butt anyways) and minimize symbols to only the group members which absolutely need it, which would maybe be the tanks on this fight.