for women/girls, I think the DA was pretty new and the clubs participating and their talent will likely just go back to ECNL, which i think was just as competitive. This deal may actually help get the most talent in the same format rather than high end talent split between ECNL and DA. Easier for USSF to now only scout talent at the ENCL tournaments/show-cases and ODP events anyway.
for men/boys, i imagine this helps USSF cut costs significantly. rather than running this whole nation-wide system of league play, show cases, etc. themselves, USSF can just scout the MLS academies, which theoretically the professional academies are already scouting the top talent in every area anyway. USSF can stop wasting so much time on the couple hundred pay-for-play clubs that have DA teams. Just to make sure no one is slipping through cracks, as MLS professional academies are not going to get everyone based on geography or other reasons, they can still scout players for their pools at boys ECNL, and USYS ODP and National League events, which maybe the MLS academies will be involved in those as well.
I think there's significant risk that men's soccer in the USA continues to deteriorate. No more DA, and with title IX, mens scholarships are about to be extinct for soccer, combined already with the high cost of pay to play club soccer and the pro academies only taking players who are already ahead in their development, meaning that everyone needed pay-to-play clubs early on just to get to the pro academy... Further, the MLS and USL professional academies do NOT have USSF's best interest in mind like DA did, even if they a better job of developing talent. The MLS and USL academies may bring in a lot of foreign talent and/or a lot of the top talent they bring in are not US eligible. There could be bright spots if clubs like FC Dallas continue developing American youth and promoting home-grown talent to the first team in MLS as well as exporting talent to Europe.
I think it's sad overall that the DA is gone, but we'll see what comes out of it. My son played in DA for a year and he was proud to wear that patch, but his club had no business driving from Houston to Frisco to get whipped by a pro academy in FC Dallas.