Eliminate the tainted supplement excuse, it's a loophole that's already been exploited (See Jones' 2016 case).
After eliminating the tainted supplement excuse, there's no need to make failed tests confidential, so revert that change.
Make missed tests public knowledge.
Get rid of the snitch clause, unless USADA makes who got snitched on public knowledge, otherwise we simply have to take their word for it that some other athlete/distributor got busted.
Limit retroactive TUE's to life-threatening situations so it can't be exploited a la Cyborg.
And unless USADA/arbitrator can cite a peer reviewed study to support their claims, such claims shouldn't be part of policy/arbitration.