Delaying V4 requirement will mean minimal uptake of V4 in the market for 2 years. Unfortunate, because V4 has some great additions.
This will sound "idealistic", but wouldn't it be great if GBCI would allow folks to use V3, but "swap" V4 credits in? Not as innovation credits (too few), but as straight out alternatives to certain credits now in V3......examples
-water submetering
-building envelope Cx
-demand response program participation
- monitoring-based Cx
- product EPDs
Example, a team registered in V3 doesn't have a shot at WEc1 ("water efficient landscaping"), maybe they have no landscaping or gardens, they get to swap this one for V4's water sub-metering credit.
Dream on.....