I would decentralize power and put ancillary services squarely and completely under the authority of clinical teams, each led by a physician.
A huge amount of my time is wasted on workarounds because ancillary services have their own goals, objectives, and metrics.
Barriers to physician-led care, that's what I would tackle.
edit: oh, for just a day? Lol, probably just sit in my office and try to get out of mtgs.