How is anyone fine with the 4-month patch delivery schedule?

[IdowhatIwant]

or is it just more ultimate and savage content, which a small minority of the players interact with anyway.

This is just a NA/EU thing, and you play on the server with the highest savage completion in NA at 22%. JP's lowest completion rate server is 22% and there highest is 46%. So when you really look at it, NA/EU is just the minority to savage but a very large number of players participate, and complete savage. As keep in mind those percentages, are based on completion, which is the players that have both the pet from normal, and the mount from savage so these numbers are smaller than actual completion. It also does not even include participation those that have not finished savage. Just because you don't participate does not mean the minority of players participate. I would probably recommend to you maybe transferring to crystal DC, they don't do much savage content and prefer to RP, you may fit in better there.

Usually when people complain about a lack of content it is only the specific content they want to do that they find lacking, not everything that is offered.

I think it is about everything that is lacking TBH, crafting / gathering isn't really all that important outside of raid patches. Fishing is a fun side mini game but serves no purpose beyond a collectathon or an occasional useful mat. Most recent things added to Golden Saucer was Maujong and Lord of Vermillion the two most popular and requested games... 1 - 2 Ultimates per expansion is decent for the number of players that participate, I would say 12 savage bosses is not for the number of players that participate so I would like this content expanded. Also do something more with fates, and the actual world give players a reason to go back to zones other than because the MSQ told you to.

d. Unless they start adding things that are ridiculous grinds, such as log in every day and collect one of these items to proceed or forever miss out on gear, there will always be down time where people have completed what they want and are waiting for the next thing.

You mean like the yearly events that you can forever miss out on? Logging in daily to collect one of these items, this already exists with daily roullettes or beast tribe quests. No putting a grind into the game does not mean that people will miss out on items, maybe you should try doing a relic quest, it's a grind, and you can do any of them at any time as long as you meet the level requirement. Perhaps introducing these in a earlier patch as it used to be would give players something more to do.