When I said "I'm not quite sure what you mean by 'Having marginal capabilities scattered across the Army, in light, medium and heavy, without coherent structures for employment or coherent support, is a perpetuation of the past without a plan for the future,'" I meant that I wasn't sure whether you disagreed with the concept of symmetrical brigades as they are now - i.e. with both medium and light in each (and one with a little bit of heavy) - or with having a heavy component at all. In other words, do you favour abandoning some components or are you arguing for an asymmetric solution.
Explain Canada's doctrine for heavy, medium and light forces, and how that is translated into structures and equipment.
You're asking the wrong guy because as I indicated above I disagree with the system as it is albeit I can understand how it got there. It's an attempt to cater to current and potentially future operations from within the same force. Catering for the future and the present is necessary. It's combining the capabilities in one force which is where I think the failure lies.
You know my view: we need a) an army for today which should be primarily light and medium quick reaction battle groups kept in separate primarily RegF brigades and b) an army for tomorrow which should be primarily heavy, designed to operate as brigades and even a division and kept in separate, primarily ResF division. In other words focus the RegF on today's issues and keep it agile enough to react across an existing threat spectrum that the government wants to react to on short notice. At the same time focus the ResF on a less likely and wider threat spectrum that may or may not occur in the future but for which capabilities need to exist should that threat occur.
Explain the rationale for three dispersed airmobile / airborne companies, two located without meaningful air support (Griffons don't count).
I don't count Griffons either. The explanation is that there is a need for airmobile/airborne forces and they are distributed based on the rotational concept which is centred on the RegF brigades. Accordingly each brigade needs a light element. That's explainable but as I said I don't agree with it. I'd concentrate the RegF light battalions in a single brigade in Petawawa near the bulk of the aviation and air transport resources.
Explain how a professional organization changes its mind every three years about what it wants to be based on the whim of the new commander.
Actually I disagree with you on the organizational change, its frequency and its being based on whims.
I think that the army is still operating under the 20-year old AWP as tweaked from time to time. Policies do need to change to keep up with changing conditions in world situations and government policies and the developments in weapons systems. IMHO we needed to make a major correction in AWP around 2013/4 - we didn't - and still haven't. We're still reactively tweaking.
We don't change every three years - especially to the maturing of weapons systems - because we're not agile enough to do so.
We do make minor tweaks every few years as we change commanders - that's only natural because we do not have an overarching vision to move us beyond AWP (the army failed with 2025 but did institute some valuable tweaks as a result of the effort). I use the term "tweaks" because I think that our army commanders have neither the clout nor funding to do more than tweak. Additionally the CAF procurement and manpower system lacks the agility to do more than tweak. I've been quite surprised at how much difficulty our various army commanders have had in building either a sustainable vision or obtaining the necessary consensus from the government (including DND), their peers, and even their subordinates, to move the goalposts.
Just as an aside on the issue of "coherent support" that you raised earlier. It goes without saying - but I'll say it anyway - that I fully agree with you. Remember that I'm a baby of the Hellyer "event." We could all see that by unifying the three services into one service that the biggest nightmare would come from trying to unite three separate logistics systems, each tuned to supporting their own organization, into a single one that would serve all three efficiently. The question was always how do you structure the new expanded system to ensure that each service still gets the very specialized logistics support that it needs. Additionally it was clear that while jointness was a desirable result that everyone supported, his vision of jointness would simply create an additional bureaucratic layer that would reduce whatever agility the three services had on their own to a snail's pace. IMHO how it was effected was quite muddled. The system that it has become is one that has incorporated many corrections to the initial incoherent "Command" structure that was built in the late 60s/early 70s. It's better than it was but still not good enough.
I just happen to be in the middle of rereading Hellyer's book "Damn the Torpedoes" (which I haven't touched since it came out three decades ago) and it still amazes me as to how much of a genius he was in his own mind.