I've run it 3 times, each class, with 3 different groups this week. One of the groups had a level 33 with pretty much no "big" exotics. Qodron fight difficulty is being hugely inflated in here, in my opinion. It's surprising that people can manage Vault of Glass or Crota and yet find this "impossible" without Ghorn or some sort of DPS spam. Take your time, Qodron doesn't have that much health.
Our strategy was to use the right side of the stage and aggressively retreating to cover against the broken stones when enemies start to overwhelm.
1 person has a fast firing shotgun like Found Verdict, Swordbreaker, etc. Preferably the highest level of the group. They are in charge of spotting and killing the Eye goblin. It is important not to kill him too soon, or else the Jailbreak buff won't last through the detain field part. This person is also in charge of clearing as many adds as possible, but when it get's hectic, the other 2 need to help out and ignore Qodron. Don't be afraid to back down when your health is low and wait for it to fully recharge - the Vex advance very slowly if you crouch and hug a rock. The killed adds will be your best source of ammo, but also don't be afraid to burn a special or heavy synth when needed. If someone dies, ignore Qodron, take cover to the right, and fight the adds until their timer allows for a revive
The other 2 are mainly going to be firing on Qodron when they get the chance. Snipers and Rockets are important here, as well as your best scout rifle. Again, back down when you need to and pay attention to when the detain field comes up and shoot it.
The biggest mistake people make here is trying to take on the Hobgoblins one at a time. This won't work. You need to hit each one after the other to get them to go into their stun shield. Then whittle their health down one by one. The person in charge of taking down the eye should be using everything they have except their fast firing shotgun. Rockets and a solid Hand Cannon would work best here.
When the detain shield comes up after killing the Eye around 10 seconds in advance, the shotgun person will need to shoot each field twice, for a total of 6 shots to release all 3 people. If your shotty is only 4 or 5, do 2 shots on your field, reload 1, 2 more shots on the other field, reload 1, and 2 more shots on the last field. As much as possible, the shotgunner should try to stay between the other 2 players. They mostly ignore Qodron for the entire fight. The other two players will be shooting their fields with their primaries while this is going on to get in a little extra damage.
Communication is key. As well as not being aggressive. This fight is all about knowing when to take cover, and calling out when the enemies are starting to overwhelm. I bet most people will take him down fairly easily after about 6-7 minutes of this. Much better than trying to spam DPS on him up front trying to avoid detain round and wiping over and over again because people don't want to learn the mechanic.