In short the BOMs rework aligns the BOMs with the current Wildfly Distributions (EE, Expansion, Preview EE and Preview Expansion), introducing new or updated BOMs for each of those distributions, which is something some users have been asking for some time.
For people worried about migration please note that if you use the EE (or the With Tools BOM variant) there will be no changes needed at all, now if you use the MicroProfile BOM then you will need to migrate your projects to use instead the Expansion BOM (or the With Tools BOM variant).
Last but not least please note that I would like us to introduce those changes very soon, so please have a look at it as soon as possible.
—E