#1: You can record raw onboard with the Codex c700 recorder module. It's an integrated system and you can choose whether or not to use it. The internal CFast interface isn't fast enough to record usable framerates on a sensor this size at 5.9k resolution. It's just math. Having a removable option saves productions money because they only have to pay for features they need.
#2: No. This camera is their high end cinema division camera. It has to compete with offerings from Arri and RED and Panasonic and the behavior and form factor those professionals expect from it.
#3. Yes. The c200 has a smaller sensor and is aimed more at the prosumer market where Canon is a very strong player. Comparing the c700FF to a c200 is pretty amusing honestly.
#4: The price is very affordable compared to its peer cameras. The Alexa SXT package starts at $70,000 and has a 3.2k sensor. And guess what? You have to use Codex recorders there too. They just integrated recording into the media bay. The RED Dragon starts at $50,000. Canon's problem is that they're just getting into making high end (market) cameras so there's a disconnect between what you expect and what you're going to get. Canon is probably losing money selling this camera at 30k. How many do you think they're going to sell? How much engineering went into making it? Etc. This is not going to be a $10k camera anytime soon.
#4: Flagship cameras should most definitely NOT have all the features of other cameras. They should be very good at what they're designed for and who is going to buy them. High end films, where Canon wants to make headway for prestige and development purposes, are going to use the Codex recorder. The cost isn't a big factor. Documentaries and on the go type productions are going to record to CFast internally. They're going for 2 markets here with a solution for each.
The more features you try to cram into any given camera, the more it weighs and the more power it uses. Pros do not want unnecessary weight and power draw. The c700 handles really nicely compared to a Varicam 35 or something (which still needs an external RAW recorder) because it doesn't try to do everything in one package.