The OP is asking about features necessary for live recording. I don't think this is very vague, subjective, or argumentative. Nor is he asking what the "best" is. His question is more one of process, and what kind of tool for the job. That is the kind of question I think should be allowed here, don't you?
If not, why not?
The OP was edited after I voted to close it. Still, there is a lot of stuff that is open in the blank.
In addition to the comment by Robert on the question, I would like to elaborate a bit on BenV's comment, and give an impression of the answers to choose from:
Live recording is not enough to know to give a proper answer. You could do primarily multitrack recording, in which I would tend to suggest a digital mixing console with different features, probably such as total recall or even DAW controller-related stuff, but you could also do a live mixdown to 2 tracks, which means you definitely want an analog mixing console with many channels, many auxes for effects, probably some busses and if you want to backup multitrack, you want to be able to get all the stuff direct-out to your multitrack recorder.
Even without mentioning portability, the type of music you plan to record, the amount of channels, etc. the difference between analog and digital consoles is big enough to not mix them up here.
I closed that question as vague because the author provided no information about what they were looking for.
What we are looking for is users to elaborate and get very, very specific about the situation you are trying to solve… "expert answers" will come from very specific questions that can be answered at least somewhat objectively.
Admittedly, I am not an audio engineer so it is entirely possible that it doesn't matter what the users plans on doing with it… that mixing consoles should all have the same features, regardless of application.
If that is so, please vote to re-open. But typically the specifics are very important in this type of question, otherwise you either going to get a bunch of "it depends" answers or the answers will become a list of random, brand-preference opinions.
The reason I closed the question: What features something should have depends on personal preference, a better wording could be minimal requirements so it isn't subjective anymore and leads to an useful question.
