I think you may be mixing Isle of Armor and Crown Tundra lol. Unless you really enjoyed the regenerator swapping hdb meta in IoA and Shifu clogging up the tier lol. Which is fair if you did. It seemed like most tended to like DLC2 more tho.
The no Ban of Urshifu-S was literally the only Bad thing of DLC1 Meta. I did like the Regenerator cores and I managed to find ways to abuse opponents using them. Then Lando-T, Heatran, Kartana, Lele and all the legendaries came back and the Meta became SM OU but without the Megas (which were cool).
Before DPP, all Legendaries had some big drawback, being either typing, movepool or mediocre ability. Since DPP, GF started to optimize them and Metas became full of them. DLC1 had very few legendaries and the average BST of the Tier was way lower than both SM and the DLC2 (or current Meta). I liked that detail a lot.
https://pokepast.es/24c6efd9c3489c8f < This was my favorite team of DLC1, Gardevoir abusing Regenerator and Magic Guard cores. You couldn,t build something similar after DLC2.
https://pokepast.es/444e85d4d8793ab8 < A Charizard HO. One of the few Times I actually liked an HO team.
https://pokepast.es/ec5f9a4f331b4a8b < Roserade being useful AND AV + Rocks Cobalion. This actually won a Snake game.
https://pokepast.es/a96afcf2b0ebfe11 < This team is the reason for which Centiskorch was one of my favorite Mons of Gen 8.
https://pokepast.es/6f7fdc5193c0d511 < Not really good, but Rapidash and Ninetales doing stuff.
https://pokepast.es/b9a698327db0c935 < A Duraludon of all things decided to break all fat cores.
https://pokepast.es/c1c6b448bad418cc < Bewear Stall.
https://pokepast.es/778c69382376d8e6 < Avalugg + Coil Stall.
https://pokepast.es/946258b2c3f6cc2b < Heracross with Grassy Terrain + Para support.
This was the type of Meta I liked. Maybe if Zygarde, Spectrier (which this SV Gen I fully approve the Ban, hopefully its never retested) and Pheromosa stayed unbanned in DLC2 I would appreciate it more, since they made the Meta very different from the usualy Lando/Heatran/Kartana/Lele/Tornadus cores that plagued the Meta. I would have also accepted the former 3 Mons being banned but with at least
some of the later (or Melmetal) making them compay in Ubers. As things turned out, DLC2 for me way worse than DLC1, my (almost) perfect Meta was totally ruined and from going 5-1 in 2020 Wcop and 6-3 in 2020 Snake I went to not winning almost any relevant game in the rest of the generation. Not only the DLC2 Meta was less fun and balanced, I also became worse myself because of it.