Honestly I hope they don't nerf the fight; I'd like to think that players such as those you describe won't make it into Heavensward with that attitude.
The game has been in desperate need of a gating mechanism of some kind to force lazy players to get their act together and start coordinating for fights and SoF is perfect for it. The trial has no major mechanics dependent on skill alone, it's not like Titan where you have to dodge endless AOEs, it just requires everyone to know their one role in the fight and execute it by interacting with the right environment object at the right time. Any players refusing to coordinate for that fight fully deserve to be stuck there. It's tough love but it's the only way to force some players to actually learn how to play in a group setting.
For the few poor souls that really try but keep getting stuck with idiots I would simply suggest either trying the PF or getting some friends or FC members to help. It's a fairly quick and easy fight if everyone knows what they're doing.