They would be stupid to raise elite levels (apart from perhaps the MQD waiver).

Business travel is still weak (and now that companies have tasted the cost savings combined with Zoom/WebEx/Google gaining broad business acceptance they aren't going to be rushing back to approve a lot of internal travel that was previously permitted.

Leisure demand was pent up but at some point the interest rates will bite and that demand is going to soften.

Plus their labor costs are soaring -- so it would be a boneheaded decision to try and cut down on their loyalty ranks even more than they've already done. That said Delta seems to be making decisions that are driven by the bean counters in contrast to their strong period from 2015 - 2020 when they were willing to spend money to make money and differentiate their brand