I agree with LHT28. If you like the itinerary, and can find a stateroom that works for you, then book it asap. We have sailed multiple segments on two ATW cruises. Yes, one or two guests had an "attitude" and already had "their" tables; while MOST guests were very friendly and affable.
Whatever negative encounters we may have had, it has NOT put us off booking future ATW segments. In fact, we have already booked the same itinerary you mention, because it exactly fits our wants, too. We will be doing LA-to-Tokyo, the first four segments of the 2024 ATW.
I hope you decide to book, and that we will see you onboard!