FF16 went in dev around 2016 in pre-production...in that time they have released 3 expansions and subsequent patch content....and are around year off of their next expansion which is a visual overhaul as well. Compared to say Business Unit 1 who make FF7 remake...they announced it went into production in 2015....its 2023 and we don't even have part 2. FF16 is a bigger game than part 1 and a longer game and were worried that 16 is taking limelight...I think it sucks to be a FF7 fan at the moment more so.
In seriousness...Endwalker has provided way more variety in content compared to Shadowbringers. The issue is just the rewards and replayability need to be addressed which can be tackled by 6.5. When their 3 variant/criterion dungeons are done they can design a longer term replayability for them. The only real difference is no relic zone but now a deep dungeon yes they don't go hand in hand in terms of comparison but that's all that's really altered.
Then we go onto resources, resources don't all go to endgame or the end section, they have clearly spent more towards trimming up Prae and Castrum, remaking and redesigning ARR dungeons and bosses, remaking two trials into solo duties, QoL galore in comparison to other expansions. Adventure plates, the largest update and rework for PvP the game has had in such a long time. Duty support being added to all prior to Shadowbringers expansions allowing more and more people to get through the story content on their own which yes is a double edged sword but at least they can progress more freely now.
Creative Business Unit 3 is a massive team, go to December 21st on the 16 twitter when they said the game is 6 months behind schedule because of delays or outright cancellations of outside contractors with their assets etc. On top of that moving Koji and Soken to 16 (Soken still does 14 though lol) is not even going to affect flow they literally barely impact the dev cycle. Yoshi P is a producer not a developer or director for 16 he is just in charge of marketing, contracts, making sure the schedule is maintained and handing day to day stuff with the project lead and director. He is just more present now because they are marketing ready for release.....he will be doing 3 fanfests in the next year for FF14 and a media tour....it's no different.
I could go on but this is a bait thread I am just tired of people not understanding there is a finite amount of resources....and they have been spent in other areas that sadly don't appeal to you...it doesn't mean they haven't been spent.