Just going to list a number of dead archetypes that could return and signal a possitive direction for the game
1. Fiora Shen - Archetypal midrange pkg that plays for value and challenges and board interaction that no longer has a place in the game.
2. Swain TF - A healthy and balanced control deck that only goes off on turn 8 and no longer has a place in the meta.
3. YOI - Love it or hate it Tristana is a card that needs to exist in some form and be playable.
4. Viktor Riven - The buffs to Viktor were an amazing possitive development that got killed this expansion
5. Darkness - One for one spell and creature trading control that no longer has a place in this meta (very saj)
6. Vlad Braum - Landmark creep is a thing and a 3 mana landmark granting your units tough and a minor stat buff just ain't it anymore
7. Tahm Kench Soraka - these Champs are so dead they are zombified but it was a unique deck while it lasted.
8. Banerman/Elites - Mono anything just isn't doing well right now unfortunately, and I do crave the simpler times when allegiance was a valid archetype.
9. Kenin - What an awesome card but unfortunately Ionia is massively under represented right now along with bandle city
10. Zigs Landmark - what a fun card with a fun play pattern, and a fun level up, and fun unique deck building
11. Nami Fizz - Another example of a very high synergy and interesting play pattern deck just dead in the water.
12. Shivana Fury - pretty interesting short lived archetype where you just make her as big as possible with double Fury triggers till she takes off to the sky
13. Day break - Another high synergy midrange deck that just doesn't cut it anymore because it's too "fair" and "balanced"
14. Kindred control - The idea of running a champ that has conditional removal as opposed to disintegrates guaranteed removal is a joke and thats the problem
15. Renekton Overwhelm - the sands will be stained with their blood, need I say more?
16. Gangplank Sejunai - yeah midrange plunder overstayed it's welcome but it was a unique deck that prioritized leveled Champs and it gets the win in my book
17 . Discard aggro - I don't care if it's Jinx, Draven, or Sion or Rumble it's a sad day when the 30 discard cards that exist can't be played
18. Nasus Slay - can you imagine going for atrocity lethals in a world where vaporize exists? Yeah me neither.
19. Asol Ramp - ramp decks that don't aim to put 20 stats in board with feel the rush are essentially useless, so why would you ever try to level Asol?
20. TF Cassino - there is an entire collection of cards dedicated to leveling TF and playing slot bot or riptide junior that can not be played in this meta.
There we go 20 decks that are awesome, high synergy, and interesting in LOR
That will never see play again because they are too fair and balanced.
So when I say that the current meta is not great, I'm referring to the fact that the card pool for brewing is limited to about 5% right now and that's the lowest it's ever been.