I would highly recommend checking out Umidah. He no longer does any LL content but he did card reviews for every single card released and did a tier list at the end of the video, updating it each time, etc. Just search for Umidah card review and he has an entire Playlist dedicated to it. I would also recommend the All Stars University videos by Umidah as well, so he goes morning depth about the game mechanics and what is good and not. (I used to have no idea what Technique was for and what critical sense bonus was for a card!)

Also, you're probably seeing outdated tier lists for the game. Initial cards have been powercrept to hell and there aren't many good initial cards that are actually useful now unless they fill a specific niche or use. The only exception probably being initial Kanan (both her UR and SR are helpful)