When I say that Rachel Week's infographic is "better" what I mean is that hers presents the info on the brackets better because it includes both the card limitations and the personality of the brackets together. WotC posted those separately.

I'm pretty sure that TappedOut sets its recommendations based on card limitations. Bracket 1 has the most limitations on what you can run while Brackets 4 and 5 have none aside from the ban list. The more your deck matches the bracket limitations the closer to Bracket 1 the recommendations will assign your deck, although it does seem like some cards haven't been tagged properly like the Plea for Guidance you mentioned. It's basically an adaptation of the system where your deck gets labelled "Not Commander Legal" if you have a banned card in it.

And I apologize if you already know this but I'm just adding this for clarity's sake, the bracket system was introduced by WotC so TappedOut is just following their guidelines for what card limitations the brackets have.

Rachel Weeks posted a nicely organized infographic on the brackets on her WachelReeks twitter account. It's better than the one that WotC put out. If you search "WachelReeks Commander Brackets beta chart" you should be able to find it. It's the one with the yellow background. You'll have to look up WotC's list of Game Changer cards separately though.

I think that WotC is also expected to release any commander ban list changes around the middle of this month, which could also change what cards are on the Game Changer list. There's an expectation that some cards may leave the banned list and get added to the Game Changer list instead.

Huh. Yeah, Plea for Guidance isn't listed as a tutor for me either. Maybe it was just missed in the tagging process.

"Many tutors" seems to mean 4 or more judging by the bracket recommendation reasons on my own decks.

Something to keep in mind with the bracket classification system is that there is the technical aspects of the brackets (what cards are and aren't allowed) but there is also a less formal gameplay personality aspect to the bracket system as well. Each bracket has its own expectations for how the decks and games in that bracket will generally play out. TappedOut's bracket recommendation system can only judge your deck based on the types of cards that the bracket system restricts. It isn't able to judge how strong your deck's card choices and synergies are.

Just because TappedOut's system says that a deck could technically count as a bracket 1 deck doesn't actually mean that's what the deck should be classified as. Bracket 1 is meant for intentionally goofy decks that want to do some sort silly gimmick that might take 10+ turns to pull off. Any deck that is reasonably built and has a solid game plan for winning would probably qualify as bracket 2 at the lowest in most instances.

It is also possible to have a deck that should be classified as a bracket 3 deck even if it doesn't run any Game Changer cards. Bracket 2 is meant for decks around the power level of a pre-constructed deck, so a well-tuned and upgraded deck would probably be too strong for that bracket and is better classified as a Bracket 3 regardless of if it has Game Changer cards or not. If your deck has any 2-card infinite combos, or can often threaten to win a game around turns 7 or 8 by some other means, then it should likely be considered a bracket 3 deck.

The bracket system is still a work in progress so at this point in time it is still relying on people to use their own judgement to honestly assess their decks. What the system does for now is give people a basis that they can use to talk about their decks with each other and make sure that everyone at the table is on the same page regarding their expectations for the sort of game that they will be playing.

I think that at this point the deck list doesn't have a solid plan for ending the game. It has Gray Merchant of Asphodel but doesn't have a focus on building up your black devotion to really make it hurt your opponent when it lands. Torment of Hailfire could be a game-ender but without any big mana ramp in the deck it will be pretty late in the game before it can really do damage. I think that, going by the list, the deck's default is to try to play a control game by using Ketramose to cantrip a bunch of exile-based removal to help your big fliers get through. Ketramose is a strong card draw engine but you've focused so much on triggering it with removal spells that you haven't planned out a solid winning strategy or combination of cards.

Maybe the deck could be shifted into more of a Blink deck? BW has all sorts of good ETB effects for generating value and tokens. Cards like Teleportation Circle, Conjurer's Closet, and Eldrazi Displacer could be the core engine cards of the deck alongside Ketramose.

There are also a variety of creatures that let you exile cards from graveyards. Withered Wretch is pretty efficient since its ability is only 1 mana and it only removes one card, giving you more opportunities to draw cards off of Ketramose.