My Suggestion is that the OOO add more bosses. the bosses now get a bit boring after you beat them countless times, So my solution is for the OOO to add new ones. Whether that means opening the core or just adding another gate I think that it would make me want to play the game more.
Also if they don't want to have 5 gates up or the core open, then just cycle the bosses thought the gate system.
u know... they cant just snap their fingers and make a boss/stratum/rewards, it takes time so have patience