That's a fair question. Honestly, the answer lies within the details we aren't privy to. I'll explain:

/r/IAMA is a machine. Victoria is a crucial part in this machine. When you decide to remove a part to a machine of yours, what do you do? What's the process?

Do you just walk up to the machine, open it, take the part out, then develop your plan? You can, but holy shit that's asking for chaos, you know?

It's like the manager of a McDonald's deciding to replace all the drive-thru headsets at their restaurant, taking them and throwing them in the trash, and then being like, "Alright.. well, guess I should start checking prices for replacement headsets." That is laughably terrible managment. Now you have to put a "please order at the window" sign up for who knows how long, and that is going to cause a chain of events: customers can't look at the menu or prices while actually ordering, resulting in a lot of "uhhh.. how much is the happy meal again?" and questions like that, adding time to each order, which makes the wait longer for the next customer, which creates a long line, which creates a "busier" restaurant, while generating the same revenue as a normal restaurant, which breeds really rushed, annoyed employees, which causes them to fuck up orders, which pisses off more customers, which will stress out the employees even more, and you see the cycle. That's just one example.

You need a gameplan. Maybe they couldn't have said "Hey, we're firing Victoria in a few hours, Karmanaut. What ideas do you have?" He's not a reddit employee, definitely not managment, and should not have been privy to that, in particular. But damage mitigation is key, here.

Right after the termination is official (paper signed, etc.), contact the mods at /r/IAMA and say, "We regret to inform you that Victoria is no longer with the company. We have assigned (insert admins here) to take over her role for the time being, to help with the transition phase while we find a more permanent solution."

Of course everyone would still be pissed because Victoria is awesome and everyone loves her, but at least reddit acted professionally throughout the process. What they did do is let her go, and that.. well, that was it. Days passed, and they were like, "Oh, we fucked up." That is not how you change a part in a machine.

You need to shut the machine down, take the part out after obtaining a replacement part, install the replacement part, and turn the machine back on. Reddit administration didn't shut the machine down or find a replacement. They reached their hand into a working, running machine, and ripped out a part, and just kinda went about their day, as if their part in this was done. Shitty. Fucking. Managment.

So back to your question: did the admins get any time to do this? It really depends. Was Victoria let go? Like, just laid off, cutbacks, the "she wouldn't move" rumor, the "she didn't want video AMA's" rumor? If it was a decision that required thought, then yes, they had time. There is no "we have to fire her NOW" in any of those things. Those are all terminations which can include transitions. Now... did Victoria show up to work drunk, wearing a strapon, screaming the N word all over the office? Did she accidentally forget to cover up her swastika face tattoo one morning? Did she beat up a black, jewish, gay, transvestite employee? If she did something that would constitute "holy shit" immediate termination, then no, they didn't have time. But EVEN IF THEY DIDN'T HAVE TIME, /r/IAMA is big enough that you make time after the fact to mitigate damage.

PR is going to take a hit, regardless, because errbody love Victoria. Reddit's gonna be the bad guy there, and they have to deal with that. But not having a gameplan? Not talking to the mods during or directly after? It's unprofessional as fuck, and the flack they're catching for it is 100% deserved.

This particular case, also, has 0% to do with Yishan, so despite how many swords he should rightfully be falling on, 'dis hea' ain't one.