Not sure why we're arguing alternate packages for Fiala. Maybe Guerin would have taken an alternate (like Clarke, Kaliyev, Byfield, etc). But we don't know. I do know there was a dearth of cost-controlled top-end LHD talent, outside of Bjornfot. And there were issues with young goaltenders to replace Petersen. Trading Faber alone isn't really an issue - you have to give to get.
But the Kings still had a couple major holes in their pipeline for a team who felt they completed their rebuild. Then traded from a position of strength (RHD) to address a need that wasn't as urgent as others (scoring winger). To them, it just mattered about the player who was available.
They blew their credit card on dress shoes that were on sale, instead of replacing the Yosemite Sam tie they were stuck wearing at someone's funeral. The shoes are nice, and you want to wear them at your own wedding, but you haven't even gotten engaged yet.
Because to some it's an indictment of Blake for no other reason, than it's indictment on Blake for no other reason, for their hatred of all things Blake...
I mean in that reality they should have been able to trade Edler and a 7th round pick for Fiala, Quick straight up for Gavrikov etc...it's just idiotic nonsense,
As to your point about team needs, kind of, 50/50, because keep in mind, they have seen the past 5 cup winners with the exception of Tampa, be won with average goaltending, so the thought process supposedly would be, build a solid deep team, and get by on average goaltending, and we don't know if that will work yet, Talbot let in 4 goals, 1 was stoppable, 3 were defensive breakdowns or good hockey...it happens.
If you want to argue that the Faber and 1st package be used for a young stud LHD, then go for it, but be prepared to identify who was available, or at least potentially available