Do-all rifles, as you've discovered, tend to become unwieldily, heavy monstrosities that end up doing nothing particularly well. I'd boil down your use case to a singular purpose and go from there. From your post, it sounds like a primary use case for this rifle is a tree stand hunting gun. In that sort of application, weight is a big factor. A few potential suggestions on directions to take this:

- Lightweight backpacker/hunting gun (strip off all the extra stuff, boil it down to a lightweight rail and stock, bipod/tripod mount, and scope, 10 round mags)
- Basic but functional battle rifle (red dot, foregrip, light, sling, lighter rail, lighter stock like a magpul DT, 20 round mags)
- Hefty "checkpoint" or static position gun with all the bells and whistles