They claim this will result in funding "high quality" applications earlier with fewer resubmissions. I don't know that this is the case. I worry about less proposals being funded.
"This policy applies to all applications, including applications submitted under the NIH Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) programs, Career Development Awards, Individual Fellowships, Institutional Training Grants, Resource Grants, Program Projects, and Centers. Currently no amendments are permitted for applications received in response to a Request for Applications (RFA) unless it is specified in the Funding Opportunity Announcement, in which case only one amendment will be permitted."