When I took GUE Fundies the first time, as a purely recreational diver, the impression I got was that despite all the standardization, it's acceptable to take the context--in my case, pure rec--into account in applying the standards.Team diving is unnecessary and often distracting to those who want to look at pretty fish and float along a reef. No need for long hose, 10 ft stops, gas switch verification, or standard kits to do that.
For example, for a 2-person "team" doing a single-tank dive "to look at pretty fish," the "team diving" aspect really doesn't mean much more than being a good buddy, including being there to donate gas if necessary. In the rec context, there aren't really any special team member duties beyond what I believe every agency teaches. Cave and tech contexts add more team member duties, sure.
As for the long hose, given that primary-donate is increasingly common among divers of all stripes, is a 5-ft hose burdensome? Personally, I didn't like the feel of the 5-ft hose, so after using a 7-ft hose for a while for my OW rec dives I eventually switched to the so-called "streamlined OW" configuration where a 40-inch hose goes under my arm and has an elbow fitting at the second stage. It's not DIR, but I'm comfortable with that deviation for my rec-only pretty fish-watching dives. I still feel the core principles of DIR make sense.
As for gas switching, now we're in the tech realm. So I guess we're diving a deep reef to look at pretty fish down there. As far as I understand, all agencies teach some type of gas switch verification protocol; it's not exclusively a DIR thing.
On lazy reef dives, stopping at 10 ft. intervals for 30 seconds on the ascent can be a fun way to keep buoyancy skills sharp and ensure the ascent never gets out of control, but of course doesn't have any other real advantage over a slow and steady ascent. If one is "inadvertently" sloppy about it I don't think the DIR police are going to come calling. Also, if the dive has me slowly winding my way higher up the reef, or on typical shore dives, the 10-ft stop thing is superfluous.
Personally, I wouldn't call these things "unnecessary" as much as I would call them things to be applied in context. A rec dive to see the pretty fish on a relatively shallow reef leaves some room for interpretation, while a tech dive demands more rigor in applying the DIR principles.