I'm tempted, but it's hard to switch off the "this would be so much better if it was commander" mentality.
I like the idea of it for the deck building restrictions, but something about the precons puts me off. The card pool is so small, and therefore the potential to adapt or upgrade the precons is equally small, so you lose a lot of the character and pride that comes from building your own commander deck, and personally I find that part of commander incredibly satisfying and find it's a large part of my enjoyment of the format; win or lose, I'm playing decks I enjoy.
Of the precons, the Knight one seems fun, but is largely being evaluated as the worst one. Again, I mostly see it as a fun commander build with a bunch of old Knights. Even Dominaria's rotation hurts it as that had a lot of decent options (Josu and his Knight brigade seems like a perfect fit).
Outside of the precons, I'm not sure. I personally don't think our visit to Ravnica provided that many decent options for commanders in either EDH or Brawl in terms of excitement. Feather and Niv are good, but become very repetitive. Brawl allows PWs too so that helps with WAR, but none of those really interest me personally.
C20 was half decent, but mostly I keep coming back to "I'd just rather this was commander".
I think when new formats appear, especially those that rotate, it's difficult to justify any kind of investment into them because you don't want it to be a waste of time and money. It's the same as Oathbreaker for me. I knocked together a couple of decks out of some stuff I had lying around, but certainly don't give it the same level of care and attention as my EDH decks. You don't want to go big if the format is dead in 6 months.
I can realistically see brawl doing well on Arena, mostly because of the absence of anything else like it on there, but I'm not so sure about it's appeal for paper, unless you're already a big standard player and have a lot of the cards you'd want already.
I'll likely give it a go on Arena, but for me that means waiting for the mac
release which I don't think is planned for this year even. When it does and I get into it, I'll likely start with the Knights and probably build some Golos 5 colour jank.
What about you Morganator? Any specific legend catching your eye?