So, as Introduction:
I am a Kensei Prestige 3 Main, 41 Hours played, K/D 2.8.

Short Version:
It is impossible to clutch a 4v1 , when one of them can just leave the fight and revive the Person i just killed, while the other two just hold me back from stopping him. There should be a limited Number of Revives Possible per Person. I think 1 Revive is already enough, 2 would already be too much. If you want an Example/further Explanation, read the long Version.

Long Version:
Pls make the Revives finite. Maybe they are already, but from my experience they are not and even when, the Number of Times before youre really dead is way too high.
I just had a Elimination Match (or however its called in English, you know 4v4 Duel with pick ups kinda) which we lost specifically because of the Revives. Normally i say if you fight with someone and you dont watch out for them to revive, its your Fault. But not in 2-4v1 Situations. In this Match, my Teammates were almost useless, it ended with me being at 14/3, and we wouldve won without the Revives. You know why? Because i was ****ING CLUTCHING IT EVERY DAMN ROUND. Seriously, they werent even good players, if they wouldve let me 1v1 each, i would say the Percentage of me winning was 80%. But the Problem was, that whenever i killed A, B and C continued to fight me, while D revived A in the exact Moment i killed B. I killed them like 4-5 Times before i got killed.Kinda the same Situation each round. And i had more of these in other Matches. If you ask why there are 4, if they were so bad i couldve easily killed my opponent and executed him so it wouldve been 3v1 right? The Problem is, i had a Lawbringer for 2 Rounds, and in both he ran away with like 10% hp left while i was almost full, once even without a scratch, to the Speed Pick up and vanished. I do agree that i shouldve known he would do that in the next round too, so that i wouldve positioned myself between him and the Pick Up, but i didnt. I was dumb.
But even if it was a 3v1, its still hard to reach Person A that revives Person B, while im being attacked by Person C.
It is really frustrating i tell you. I dont know why you didnt think of this when you had the Idea to implement a Revive System, that wouldve been my first tought: "Wait, we should limit the Amount of times someone can be revived so that People even have a Chance in a 4v1". Nah, thats too high for Ubisoft. Sry Ubisoft, but you ****ed up so many things in so many Games, where i just facepalmed because it was so obvious. Guard break for example, thank god its getting reversed next patch, but the System was fine in the Beta, seriously why change it? I do think its good that it takes skill to block it how it now does, but its simply not good because the Person in Front of you has to be just one Milisecond faster in using guardbreak to throw you off, unlike in the Beta where People cancelled each other out when they tried to use at the same time. Or putting Skirmish, the most hated Gamemode, together in one Queue with Elimination, the at leasts second most Popular (in my Opinion the best)

So please, just limit them. My suggestion is that is just once, being able to stand up after getting defeated two times is already too much i think. Otherwise winning in a 4v1 simply isnt possible.