Your system looks good so far; however, it's hard to tell exactly what your perspectives are showing with the view bar hidden.
In my system I handle someday/maybe projects in a couple of ways. I keep really far out ideas in a separate OmniOutliner document. This includes things like retirement ideas, which are 25+ years away.
I keep "someday soon" projects in OmniFocus, set to on-hold, with an appropriate review interval set. During my weekly review I look at my On-Hold Review Perspective and review any on-hold projects due for review in the next week. Here's what the perspective settings look like:
I use start dates to manage ticklers. I create an action and set a future start date corresponding to when I want to be reminded. In my evening review, one of my perspectives is a Tickler perspective that shows Remaining items starting tomorrow. Here's what that looks like:
I use top-level folders to group my projects and singleton actions into areas of responsibility (work, household, family, etc.). I keep a separate single action list inside each folder. This lets me use the Focus functionality to focus on an area of responsibility that I've been neglecting.
I've found that over time I've developed several perspectives that I visit during reviews.
- My morning review includes four perspectives: inbox, active projects due for review, urgent radar (context mode, remaining actions, sorted and grouped by due date), and important (context mode, available and flagged actions, grouped by context).
- My evening review includes three perspectives: ticklers, inbox, errands (context mode, just errand contexts selected, grouped by context)
- My weekly review includes three perspectives: on-hold review, inbox (to process any items I identified during my mindsweep), full action list (context mode, available actions, grouped by context)
I'd urge you not to try to set up the perfect system, but to let it evolve over time. One of my monthly review items is to ponder where my system is working well and where improvement might be needed. I try not to change too much at a time so that I can make a realistic judgment about whether the change was an improvement. I'll often create a project for making the change to my system. The last task in the project would have a future start date and would be like "Evaluate whether change X improved your ability to do Y."
Good luck!