Not sure if you are referring to the last 3-4 months of debate based on Secretary Kendall's pause on NGAD leading to a blue-ribbon committee reviewing program and proposing next steps etc. If so, it appears to be significantly influenced by budget outlook and reading between the lines seems to be a pause to assess whether they should substantially ('not minor compromises to get a finished product') diverge from the plans they've been developing and try to field something else instead of pursuing something that will get stuck somewhere in development and not field in quantities that are needed due to budgets. You are talking about $5-$10 Billion in RDT&E dollars a year (peak years) to develop PCA, CCA, NGAP etc which is like 10-12% of the entire AF RDTE budget (and likely 15-20% if you strip out pass through and space force funding). Procurement likewise can be expected to be 2x of what the AF is presently spending on F-35As each year - and for likely half the quantity. I believe the group assembled by Frank Kendall recommended that the manned PCA be pursued as the path forward.
While its one thing to suggest that they should set that aside and pursue capabilities and CONOPS that fit better with budget, it assumes that there are 'cheap' or at least significantly more affordable asymmetric capabilities that the service can rapidly invest to regain the sort of edge it hoped to gain via NGAD (even if its in the collective through multiple capabilities). Its not going to be long before China fields a regional force comprising of more than 1,000 stealthy fifth and fifth gen plus fighters, bombers and UAV's. The clock is ticking. Of those 'candidate alternatives', if they cannot be put into production later this decade, they really aren't very viable as options IMHO.