To me, this sounds like you put bananas, strawberries, a mango, and an onion into a blender, and now you’re complaining that the onions are bad because you didn’t like your smoothie.
I don’t know what dungeon you were in, what enemies you were fighting, how many players were with you, and how many followers they had, but those are important things to take into account.
Let me try to put this into perspective. For starters, I play solo. Not single-player, but alone on an official server. I have 0 in authority myself, and I’ve got my fair share of followers killed before I stopped taking them with me. They’re like wet paper right now.
I’ll probably try out an authority spec one of these days, to see what that playstyle is like, and I fully expect my followers to be powerful, because they’ll be all that stands between me and my enemies. If they fail to protect me, if they can’t help me win the fight, then the authority spec will be useless to me and I’ll respec into some other build and never put any points into authority again.
Now, if I’m going to run around with a whole bunch of other people, I expect that my contribution to the fight will be a lot more limited. The more in the party, the less significant I’ll be. That’s one of the reasons why I play solo: being a “hero” is a lot more likely when there’s no one to cast their shadow on you 
So my advice would be to perhaps put a bit more effort into coordinating with your friends, instead of asking Funcom to nerf things even further. At some point, you have to come to terms with the fact that this game has to keep supporting a multitude of playstyles, not just yours.
Whether you like it or not, followers are dumber than a sack of hammers when compared to a player. I’m not saying this to disparage the devs and their skills, it’s just the way this game works. The more you want to rely on them, the stronger they have to be. I find the authority attribute a really smart solution for that particular problem, and I think that what you describe would make followers not viable for solo players like me.
When you have two players with a strength build, they can communicate to adapt their tactics. When you have a player with a strength build and a thrall that’s does “damage comparable to a strength build”, well, it’s gonna be a disaster.
Right now, the worst thing that happens with your playstyle is that you feel dissatisfied with the gameplay in certain situations, but it’s not like you can’t fight certain fights or you keep losing your followers. If Funcom nerfed the followers per your suggestion, my playstyle would face a limitation like that, i.e. there would be certain fights I couldn’t win with my followers, without losing them.
When I compare your avoidable dissatisfaction with the possibility of having my playstyle crippled, I think I know which one I would pick 