Personally I am one of the players who didn't want to play AoS. The system change to a non formations maneuver "big army simulator" game. But when I played it, I recognize a very quick, fun and very strategic game with many possibilities. Our play group didn't change te bases to back to play 9th age or (Spanish) Warhammer Reforged, but after many discussions with the number of attackers due to base form and size, we'll see necessary to keep it in mind. When SOLO Ediciones have been working on this adapters, we received prototipes and see how well they worked. With only slide inside and click, no damage to original base, and with the transparent one, the effect seems really nice.
So we were writing the conversion table (that differs the articles you have here) and support them all as we can. We want ours, and need everyone who wants too to collaborate and share.
Note: repeat, are not our bases, SOLO Ediciones is an enterprise from our zone.