I have mixed feelings about the Chandra.
The 0 is great, no argument there! Super-sweet and definitely the power level I expect from a 6-cmc walker. Her ability to wipe the board is... questionable. Only being able to pop for 3 (and live) when she comes down feels awfully weak for 6-cmc, it just doesn't deal with the majority of 'true' threats that are floating around by the time you expect to cast her (and neither does 4 for that matter). Crashing for 6 is probably the real reason for her cost, since being able to ACTUALLY end the game with three + activations isn't a small thing by any means. Splitting it across two 3/1s without trample is meh, but we can't have it all.
Just imagine a simple, average scenario: Your opponent has, well, a 4/4. Or larger. There are tons of cards that fit that bill. You can't effectively cast chandra into it without losing her or gaining minimal value (killing a 4/4, hitting them for three, or cycling your hand). Not a great value for a 6-cmc walker. The "best" (realistic) scenarios you can get for her are things like an opponent stabilizing with a planeswalker (that chandra can kill) or them just having a ton of small guys.
What really puts her in the "not great" category for me is simply that when you land her on an empty board, where high-costing walkers force your opponent to either have the 1:1 or sacrifice many resources, Chandra just isn't enough. In a vacuum (I know, but hey this shit happens a lot) you land chandra, they untap and plop a siege rhino or something? The best you can do is trade her away. Elspeth, Apex Predator, Karn, Ugin, nicol bolas, hell even Caller of Beasts probably has a good way to at least maintain parity. Sorin Markov and Chandra Ablaze (both from OG zendikar, and some of the earliest designs) are the only heavy-costers that are questionable. Cycling my tiny hand+1 and praying for removal isn't what I want to be doing with my 6-cmc walker yo.
She IS charm-like, which is cool, but it's a charm with a strong burn mode and two 'maybe' modes that are fine effects, but overcosted at six. Calling her 'another shitty chandra' is pretty harsh, but at the end of the day her best mode IS what her + has always been: Slap Face. I don't know what would actually make people happy with a red planeswalker, and I like pyromaster and koth well enough, but this doesn't do it for me. The recent red walkers have all felt like near-misses: Domri and Xenagos were both 80% green, Sarkhan couldn't kill siege rhino, the boogeyman of the same set, origins Chandra was strictly an aggro/burn card, and now this is some kind of weird curve-topper for the high-toughness red eldrazi deck or something.
P.S. The Oath booster packaging has those super-early arts of the walkers all 'pledging' or whatever- seems like a likely cycle of charms/commands!
