As someone who watched a good majority of this era of All Japan, I really liked it. In fact, I prefered it to NOAH (at least from 2000-2002)
NOAH also suffered from a weakened roster, of course, not as much as AJPW did, but with all those mid carders foreigners gone, they lost a bit of depth, even if on their own those wrestlers don't generally amount to much, they helped prevent the stars being spread thin. Also, NOAH was pretty poorly booked imo, like the tag division fell apart with Taue's new partner being Jun Izumida, who was fucking awful. No Fear didn't get much of a push as a tag team, and Kenta Kobashi/Jun Akiyama spliting. All Japan's tag division was far from perfect, but I sensed more effort to keep it to a high level.
The juniors weren't great for either really, there wasn't much of a junior scene in All Japan, so NOAH's is better, but it takes until the next era for it to be actually be good (excellent) for NOAH, so its not much of a factor.
AJPW just feels a lot fresher, as NOAH takes a while to bring in outsiders and foreigners which hurts them, and keeps them from being fresh or having depth.