A suggestion for heroes

[Korvessa]

I erroneously posted a similar topic under tech support instead of here, so this is kind of a correction/modification and a suggestion.

I probably like to complain too much, but good grief the hero selection is odd.
I am about halfway through the 1939 DLC after having completed SCW.
I do not have:
Double or 1.5 fire
Zero slots (I do have a 1/2 slot)
No shock tactics
No Butcher
No envelopment

But I do have:
2 x entrenchment killer 4
2 x double support
2 x lethal attack
and worst of all
3 x legendary - and that doesn't include the two superheroes. Yeah, I have 35,000 prestige

It would be nice if we could do hero trades. I would be willing to trade 2-3 of these guys for one of my choice. We can sell them, why not trade them?