I'd rather commission my 3.15s and 4.21s into chickens 

The next update will turn a vault champ into a game changer.  I dont see the advantage to "commission".  

Epics and potentially rares clogging up the vault are the best use case imo. 

What is an accessory

I don't have rare fg currently except dupe coldheart and maybe a bellower and apothecary.  May be worth for cursed city... 

Yeah, I haven't touched FG much for for rares this is precisely where people are using them from time to time, especially if you've got any reasonable blessings

i am sorry but I really dont see the purpose of this function then to confuse peope.

Is this something people were saying needed a look at?

I going to say no, I bet it was developer pet project

I just cant see why this was needed

I have seen multiple requests on Discord for something like this. It makes the FG bonuses permanent and clears out space from the inventory.

It seemed totally unnecessary to me, so I never figured they would do it, but here we are....

My rare FG are totally empty except for Dark Elves for Cold Heart.

Not sure Rare FGs are worth all those 3* chickens even if they won't take up space.  

This is basically why I thought it was put in the game though I do think just not counting Faction Guardians towards your champ count would be way better but alas, here we are.

Easy way to think about it is just farm the rears that you can out of the campaign and just throw them in there you ain't got to waste no resources other than a little bit of energy

I get the idea behind the commission, but it would be so much more convenient if Faction Guardians didn’t count as full champions. That way, the squad limit could stay in place without overloading the team.  I found some useful guides and tips for managing squads here — m ight help optimize your team setup. 

Agreed.  I did the rares but mostly just because I could.  It'd be alot better if instead of commissioning they just got shoved into a 3rd, hidden vault.