Migrating from YongNuo to Godox: Questions

I currently have two YN YN600EX-RT and a YN-E3-RX. I recently blew out on of the YN600EX-RT. I am debating on whether to just replace that unit with another YN600EX-RT, or sell/dump the system and go with Godox, which seems to be getting great reviews and is a community favorite.

(1) I like the fact that the YN system uses the Canon RT system, as opposed to a third-party proprietary system like Godox's. But I've read that the YN system is facing difficulties with Canon's newer bodies, and this is by deliberate design by Canon to prevent third-party knock-off's/clones from parasitizing their system. Is this true?

(2) I've read that both YN and Godox have issues with the auto-focus assist light on newer Canon bodies. Is this true?

(3) If I go with the Godox system, I want an on-camera speedlight with built-in RT receivers/transmitters​, TTL, HSS. Basically, an equivalent of the 600EX-RT (Canon or YN). I want the unit to take the traditional AA batteries, as opposed to custom Li-On blocks. Best I can make out, I should be looking at this:

Godox TT685C E-TTL
https://www.amazon.com …2XO0I&colid=29O​0QMQ8BLMBG

with the following for master control:

Godox X1C TTL Wireless Transmitter for Canon EOS series cameras (X1C-T)
https://www.amazon.com …0I4G7&colid=29O​0QMQ8BLMBG

Is that correct? Or is there something else I should be looking at?

Thats all you need, if you want to move up to more powerful options in the future (Ad200 and Xplor600) the remote can command them as well.

Thanks! It seems that the focus-assist thing MAY have been fixed with the latest models ...