I quite liked the 767s ... especially with the single column of window seats in J.
Absolutely. The 330 J suites at least give one those single seats on both windows, which is a win over the older config (not to mention the suite design, and lie flat bed).
btw the days of 5 across on the 737 in Y probably ended around the time the 737-200 was introduced
JohnK makes some reasonable points, but they are also subjective. I agree, for example, the J suites in the 330 (QF config) are poor for companions traveling together (unless they don't want to interact !

) but for singletons they are pretty good. We all have our specific needs and preferences (the lav situation suchs for all).
Let's also remember that it's unfair to tar an aircraft type (such as the 330 or 777) with a single brush is unfair given each carrier can make or break it with the seating, galley, lav(etc) config they choose to deploy. For example, Nobody would think the JQ 787s, specially in Y are very good in any way shape or form (if you find someone, let me know.. I'll meet them at the Tiger Lounge to disccuss !). This doesn't make the 787 per se a bad aircraft (OTOH, issues such as the poor dimming of the windows are a universal "feature" of this design and am happy to comment on that aspect of the aircraft).
For years, the 777's 3-3-3 in Y was considered fairly decent by many and it was only EK who had 10 across in some sections.. now more and more carriers are doing this, and it is hell (I was on a UA 777 with 3-4-3 recently, luckily up front, and it looked dire as I entered the cabin). Again, this does not make the 777 a poor aircraft.
Yes, the 330 fills a 767 replacement role in many respects and even has a similar cross section (eg: 2-4-2 in Y, anything from 1-2-1 to 2-3-2 in J depending on carrier and product).
Finally why schedule flights hourly (or less) on some routes? because Schedule demand is king!!! Why on MEL-SYD do you some times have every 15 minutes during peak times? Capacity and schedule. If you're on a business trip and you finish meetings early you don't want to have to wait 2 hours for the next flight to get home.. and by the same token if you finish late, you want to be able to get on the next flight within a reasonable amount of time - and will pay for this via flex fares.
This is exactly why we have aircraft like the 787 and the 330neo these days - even on longer routes, say Australia to Asia if you can offer 3 flights a day say morning, afternoon and evening vs 1 A380 or 747 size aircraft, you offer the public so many more options - specially for those connecting to different places (eg: SYD-SIN-Europe vs SYD-SIN-India/China).
Why does QF deploy the 737 on trans tasman routes? Schedule and matching capacity more closely to demand. Not to mention these aircraft are far more efficient at the missions than larger longer haul aircraft.