If indeed Ultimate would require less development overhead, then arguably a small, collaborative team would be a lot more effective than a larger team; there comes a point in Project Management where applying too many resources to one project just oversaturates it; makes it ineffective, and arguably wastes a lot more developmental resources than anything else. There are costs and so forth to be considered when shifting around resources/people, so a lot of logistics involved with reallocating resources.
It is; that much I in fact do agree on, especially for Ultimate content. Regarding Deep Dungeon though, it's a goal in the midst for me so I have more to say about this. If we were to get a sequel on this then I would much prefer a delay if it enables them to continue this down the line with much more innovative elements rather than just a different environment with a couple of different pomanders. Arguably they've not lived up to their expectations in some areas of it, be it with Viera/Hrothgar. I can't complain or slate the dungeons because they are far more enjoyable than ever before, and the quality for me, trumps the quantity, especially when if you look in the grand scheme of things they have still been pouring their resources into other content; Ocean Fishing, and Ishgard Restoration very quickly come to mind for me! Regards for Ultimate though, COVID-19 is a cruel thing to everyone, sure they won't be able to ride that excuse extensively now, but it's damn sure currently a valid excuse all things considered. Same to you, the discussion has been.. Well, not with a brick wall, so, pleasant I guess!