The blades need to be changed, one way or another. It's not only just for being "pug friendly", the bigger problem is being "melee friendly".
Currently my guild only runs elite shroud once a week at most - and when we do, we fill the group with casters/divines. It is the only practical approach. Why? because the blades screw over melees big time where they are needed the most, in parts 4/5.
I'll explain why. In part 4, while clearing trash mobs killing a devil will spawn blades right where it drops. If you were a poor soul meleeing the sucker down, like you were supposed to, you get penalized for killing it at close range and get torn up by the blades - and if unlucky on your rolls, are killed very quickly.
Same scenario, a caster walks into part 4. He uses power word kill on a devil across the map, the blades pop up far far away from him, and he laughs at how harmless they are to him.
Now we get to the Harry Fight. The melees surround him and beat on him, the blades form a very, very static circular pattern that does not affect casters - simply don't stand in front of the blades and they are harmless. the blades close in, if you are a poor melee soul who stays in a second too late - which is easy to do, the blades will start hitting you before they physically are toughing you in game, you get torn up and take massive blade damage + harry's physical damage. Everyone's natural reaction is to run away, it shotguns all melees in various directions and if your lucky, one or two of them might make it out alive, if your unlucky those few who did make it out will get hit with a meteor swarm in the back .
Part 5 is much, much less of a big deal. Part 4 is the extremely unforgiving part in which someone dies, they are out of the fight - too many deaths and the party cannot recover, you have nearly 25 minutes wasted.
The blades need to be changed - you don't necessarily have to nerf the damage they do, but change how they spawn and how they move - I don't know, give harry a tell so he calls the blades in on him, or has the blades shotgun outwards so that both melees and casters are in danger of them.
Either way, a lot of changes to the game recently have penalized playing melee characters - In fact, the only reason to play a melee at this point is to tank raid bosses, and even that is getting to be nearly pointless since anyone (including casters) can take the shield mastery feats for the DR bonuses.