I've played with each character type now with each loadout equipped for about 4 missions each. I've found that fighting Dreadnoughts is just no fun on any of them. Either I'm doing the wrong things or some tweaking is in order because every fight ends like this: me face tanking the dreadnought spamming health pots with no suppression left trying to kill him before he kills me.
As ranged I've tried targeting individual limbs to blow off a gun or a leg, but after ten or so shots to the same body part still no effect. I fall back and get behind cover, hit it with grenades when it's stationary firing at me, but those run out and he closes the gap, destroys cover and either way I end up backed into a corner face tanking as my suppression and health go down and down.
His range seems much further than my range, but it doesn't matter because by the time you stand still long enough to try and put some damage on him he's on top of you and you're in a corner face tanking again.
As melee it's the same story except without the basically non-existent advantage of range.
I haven't died to a dreadnought yet, but in no spec with either loadout have I found the fights enjoyable. It's just long, drawn out and frustrating.
I'd like to know if other people have had the same experience, or if people have some tactics they use to make the fight seem more tactical, more fun and more like real combat. Like a real mini-boss encounter.
Any feedback welcome!
Edit: I realise that I've just sighted problems and offered no real ideas for solutions. The only thing I can think of is that dismantling or disabling them by taking out legs, arms, guns etc somehow with each of the three character types might make the fights more dynamic. But that's all I've got, hopefully you guys out there are more creative and imaginative than me :)