OK. I heard the Adante in a dealer's demo room. Not a large room, but well prepared, and everything properly set up (I have to say most dealers don't do this very well in these parts). I wasn't there looking for speakers, but for a CD or SACD player. The amp was an Esoteric F-07, which I don't know but should have been plenty good enough. No sub. Since I was mainly there to find out about the disc players in terms of ergonomics, remotes and facilities, having a "not so good" speaker was a bit less bothersome. And this was during covid, I was let in "between appointments" so I was basically left alone for almost an hour and couldn't really ask for a different speaker to be set up. I have to say that my experience couldn't have been more different to yours. I'd started with the Arcam SACD player which was disappointing and I thought that it may have been responsible (or indeed my prejudice was coming through as the player didn't play some of my discs either) but the Esoteric players in the room, and the Denon 110 anniversary player would all have to have been awful as well.
Measurement based reviews of both Adante models showed issues, but not as bad as what I heard. It's why I wonder if build quality had something to do with it. As I noted before, Stereophile and HiFi News reviews of other Andrew Jones ELAC models showed poor matching (I'll leave you to find those).
I came across another sample at a different dealer, but in a comparator setup. It was superficially as bad, and was being sold off at around half price. It still didn't sell. Again I was looking at disc players and didn't take too much notice other than "them again". There's a fair chance that on that occasion I was "hearing what I expected". On a later visit they had been replaced by Wharfedale Evo floorstanders (a standmount from the range did badly here as well, so it goes) which in turn sounded excellent with the same Marantz amp, the PM-10. I bought the amp, by the way.
Disclaimer - this is of course a sighted subjective reaction. I'm not always prepared to stand by a dealer's demo room assessment of a product, especially a speaker. There's too much to go wrong. On this occasion, because of the circumstances, I am. Though perhaps I should really bow to the "so-so" measurements made here and elsewhere, at least. I'm pleased also that you have a speaker that you enjoy. That's the important thing!