It is likely that OMB will begin the review of Treasury tax regulations, an exemption from OMB review which was granted over three decades ago that should never occurred in the first place.
Having worked for more than a half century to vest OMB with the authority to review regulations I doubt whether there are any new arguments against OMB’s likely new role will emerge during the current debate.
The traditional arguments include the lack of OMB expertise in the particular subject matter at hand. I heard this argument many times over when OMB (OIRA and its predecessor organizations) began to review EPA regulations.