Stéph, thanks for the feedback and sorry for the late response. Seems I had forgotten to subscribe for email updates.
I'm not familiar with the 7 habits other than by name and brief outline. So haven't played with it. (I like your idea of defining roles. Is this from the 7 habits concept?).
I think it is helpful to blend in (or top-load) other models that help go beyond the very task-driven philosophy of GTD.
Yes, GTD sort of covers it with reviews and the "altitude concept" - but it tends to get too little attention because it is not as nuts-and-bolts as all the rest. It is not described in detail and it is not as easily rolled into a tool that supports it.
I find the goals important for the "altitude concept" or whatever way strategic goals are arranged. But since goals on a year-level or more are on a strategic level, I don't find it terribly important to have them embedded/included in my every-day productivity/action tool. (And I think that's another reason Goals don't get a lot of attention in MLO talks or in the manual).
It is good to have them handy and to look at them often - if for nothing else, simply to keep them top of mind. But I could have them in whatever list or document on my phone that is easy to call up. (Perhaps combined with various visualization / affirmation / motivation information).
The actual execution on my high level goals would be "bridged" through one or more strategic plans (that often involve several goals) and then high-level projects ("programs" really) with many projects below them.
For example, if I wanted to change career this might involve several goals both for work and private (e.g. moving to a different city). Clever strategy and brilliant planning is when one can "merge" goals into these kind of strategies that cover all / make the best compromise. In that example, I would have to take both my career ambitions, my lifestyle preferences and relationship goals into perspective in the plans. A project of "survey new place to live" would be referring to all 3 of these in some way.
I could of course also put them in MLO but right now I am holding off, as I am considering to use those goals for something more "custom" which is not (always) tied up on week, month or year. (So I might use the week/month/year setting to signify another meaning and keep my yearly goals elsewhere).
I support that MLO has goals or some kind of projects/tasks which are kept out of the normal to-do centric lists and more of a "review and check off periodically" thing. But with an extra option that is not a hard setting with week/month/year.
To use this for achievements that are not about specific one-time tasks but more about HOW (my policies, habits, ways of doing things - ie. QUALITY you might say) and HOW MUCH (as in, quota. E.g. "call 10 new leads" or "send out 10 job applications). The HOW I operate can also be used for various kinds of habit mastery.
About habits and routines, some of them could be permanent "policy", others could be temporary to handle some situation. Such as: "For the next two weeks, use 30 minutes daily to sort and clean up that huge box of paper mess". (Of course, when it gets that specific, it could be a recurring task, I know).
There are many variants of HOW, HOW MUCH or REGULARLY (temporary or permanent) and I will be analyzing this further. I find that I often pause and ponder when defining work in my projects because part of the solution falls under this.
Sorry if this became TL;DR but it is a sort of fishy subject with many loose ends. I'd love if it could stimulate others to give their own views and ideas.
In short about MLO features it would be nice to have a variance of goals that are not forced on a fixed time schedule.