There actually has been little duplication of effort to date. Diversity in ownership, leadership roles, and funding mechanisms is also good. Modularity is desirable. Taper or volume and decay are good candidates. Facilitate communication among modellers.
Deliberate gradients are best for process modelling.
PSPs are important for mortality modelling, okay for accretion. Not useful for regeneration in their current format. Expand PSP coverage into complex stands and to include small trees. Emphasize data co-operatives. Inventories should be upgraded to provide the information required to model complex stands.