That's as may be ... but it doesn't really address the issues of dive planning in mixed teams. Issues of gas matching, deco schedules and emergency bailout are significantly different with mixed teams than they are when all teams are on the same type of gear ... and I'm not sure any of the potential solutions would fall within what is considered DIR protocols. For example, in the mixed-team dives I've done, each diver carries their own emergency bailout ... which rather violates the whole team resources concept. It works ... but it ain't DIR ...
... Bob (Grateful Diver)
UTD CCR or SM way of dive is very ... special, with many weakness (to isolate a leak on SM the diver had to unplug some hose connections (QC6 type) ...) but is fully compliant with a DIR backmount diver (same gas even in rebreather (the diluent is the bottom bail-out), LH in the same place ...).
UTD has preserved DIR movements (V drill, LH drills ...) not DIR principles (KISS ...)