Good old sunwell. I loved that place.
If it was a big dragon dude then that's avoidable by not standing close to people when he ports someone to the demon realm thingy.
If it was a big robot dude then it was just trash thats designed to scare away pugs from farming the many epics that the trash drops. Don't lifetap when fighting it, go all out with damage(my sw pugs use heroism/bloodlust on it right away), and pray you have enough resto druid/holy priests to keep you upright.
Sunwell gets a bad rap for alot of things, but all fights but felmyst require less movement than uldar(which is supposed to be easier by design, when not considering hardmodes). Stack dps and raid healers and Sunwell isn't so rough even in its un-nerfed form.

Any 2x5boxer groups taken on this place? Might be a fun place to collect old achivements and gear sets since its so brute force burn down friendly.