Thank you.
Full Caster Subclasses - Check
New spells - Check
No Martial subclasses - Check
No new Fighting Styles or manoeuvres - Check
No new Classes that showcase the new world - Check
Little player material at all - Check
Are the designers utterly incapable of learning from past mistakes?
Obviously we don't know a lot with the book not out, plus I didn't play the card game enough to know any flavor text (all my knowledge coming from the design pages and the book).
But I think the crux of the arguments come down to some people doubting how much a person's kingdom job and neighbors influence their lives, and possibly an overestimation of how much material a setting can realistically have in it first foray into print.
Of course Ravnica will have much less than Faerun, Athas, Sigil or Eberron. It has a couple hundred pages to put forth the important concepts and enough game material to get going. I counted well over a thousand pages of Dark Sun material. Heck, I had that much Al-Qadim. by last week. Forgotten Realms has more novels than I can count about one person.
Ravnica will probably have plenty of stuff to get someone who likes that setting and the themes going but will obviously have a very open landscape to be filled in by players and DMs since they only have the one sourcebook and a handful of small novels.
I'm okay with that, in part because I get the idea of Ravnica (and love me some Simic, I wanted to be a genetic engineer when I was younger), and in part because I always felt a little uncomfortable getting into a Forgotten Realms game because I thought I needed to read 20 years of material to know what is going on and what is being referenced.
They do have a martial side bar so maybe it will having fighting style or something. Plus the Sword of the Paruns will likely rock for fighters and maybe Rogues.
They did have a fighter subclass for this book, the brute, but it was too unpopular.
Honestly an MtG inspired setting is the worst setting to look for pure martial abilities, everything seems to be magically changed and even by the standards of MtG magic is insanely common place.
Full Caster Subclasses - Check
New spells - Check
No Martial subclasses - Check
No new Fighting Styles or manoeuvres - Check
No new Classes that showcase the new world - Check
Little player material at all - Check
Are the designers utterly incapable of learning from past mistakes?
Oooooohhhh a sidebar! Consider me underwhelmed.