If it really bothers you that much then game the system.
Have everyone in your static get an alt to 110 and crush their +2 keystone for 3x4 chests a week (losing one x3 on your alt ofc) it will reset back to a 2 every week as long as you don't go higher.
The only thing I want fixed is the depleted system. IMO a keystone should get depleted if you finish the run over the timer and collect your loot. There should be a UI option to scrub the run and get your keystone back as is.