Russia attacking the rest of Ukraine may be a tactic to keep Ukraine from concentrating it’s forces in the east, rather than an attempt to take significant territory. It’s still possible Russia will stop and consolidate gains after taking a chunk of the east (like in Georgia and Crimea).
Occupying Kiev is the kind of thing where cheap weapons (missiles) can destroy expensive weapons (tanks), and is probably very undesirable, depending on how many of those cheap weapons have gotten and will get to Ukrainians. It might be possible to install a puppet government with minimal losses, though.
I would love an elaborate collector’s edition box set for my coffee table when all six books are revised. The version on my phone is the one I’m actually going to read, but this is the kind of thing I want friends to see in my apartment when they visit.