You're not wrong about a good chunk of Lisa's Classic era fare getting sidelined in favour of other characters (mainly Homer) even for episodes that universally well-liked. But seeing how I invoked this line of argument and want to make a distinction versus the HD era's reception (at least in these quarters), I'd like to dive into this somewhat more deeply.
We held our last top episode poll as a community back in 2022. Here's the Top 50 with the Lisa-centric episodes highlighted...
1. Cape Feare
2. Who Shot Mr. Burns? (Part One)
3. Summer of 4 ft. 2
4. Treehouse of Horror V
5. Homer the Heretic
6. Lisa’s Substitute
7. Last Exit to Springfield
8. Mother Simpson
9. Homer at the Bat
10. Rosebud
11. Homer’s Enemy
12. Marge vs. the Monorail
13. And Maggie Makes Three
14. Homer Badman
15. Bart Sells His Soul
16. 22 Short Films About Springfield
17. Lisa’s First Word
(I consider this to be more Bart-centric than anything)
18. Bart Gets an F
19. You Only Move Twice
20. Homer the Great
21. King-Size Homer
22. The Way We Was
23. Homer’s Triple Bypass
24. The City of New York vs. Homer Simpson
25. Itchy & Scratchy Land
26. Lemon of Troy
27. Who Shot Mr. Burns? (Part Two)
28. Duffless
29. One Fish, Two Fish, Blowfish, Blue Fish
30. Bart’s Comet
31. Homer vs. the Eighteenth Amendment
32. The Springfield Files
33. I Married Marge
34. Lisa the Vegetarian
35. The Cartridge Family
36. El Viaje Misterioso de Nuestro Jomer
37. Two Cars in Every Garage and Three Eyes on Every Fish
38. Bart on the Road
39. The Last Temptation of Homer
40. Mr. Plow
41. $pringfield (or, How I Learned to Stop Worrying and Love Legalized Gambling)
42. Deep Space Homer
43. Homie the Clown
44. Lisa’s Wedding
45. Marge Be Not Proud
46. The Itchy & Scratchy & Poochie Show
47. Homer vs. Lisa and the 8th Commandment
48. A Streetcar Named Marge
49. Treehouse of Horror IV
50. Bart of Darkness
So we have 6 clear Lisa-centric episodes in total (one with her in a proxy role)... with Lisa on Ice, I Love Lisa and Lisa's Pony all close by on the proverbial Top 50 bubble.
Now let's look at
the consensus HD era Top 50 from last September with the same approach, bearing in mind that A Mid-Childhood Night's Dream, Clan of the Cave Mom and Iron Marge (which you could argue is shared Bart/Lisa-centric although it's probably just an overall family+Agnes episode in terms of focus) will all make the cut next fall and Do the Wrong Thing will make a solid play for inclusion as well.
Treehouse of Horror XXXIII - 4.51
The Way of the Dog - 4.43
The Last Barfighter - 4.41
A Serious Flanders - 4.38
Halloween of Horror - 4.25
The Dad-Feelings Limited - 4.25
Holidays of Future Passed - 4.24
Bartless - 4.24
Pixelated and Afraid - 4.21
Thanksgiving of Horror - 4.13
Brick Like Me - 4.11
(I consider this to be more Homer-centric than anything)
Eeny Teeny Maya Moe - 4.07
Oh Brother, Where Bart Thou? - 4.05
Gone Boy - 4.03
Barthood - 4.01
There Will Be Buds - 3.98
Forgive and Regret - 3.94
The Book Job - 3.93
Treehouse of Horror XX - 3.92
Lisa the Boy Scout - 3.91
Gone Maggie Gone - 3.91 (probably fair to treat this just like WSMB Part 2 in terms of being Lisa-focused as she's the audience proxy for solving a mystery)
The Town - 3.90
Not It - 3.89
Boys N the Highlands - 3.89
King Leer - 3.88
Girls Just Shauna Have Fun - 3.88
Livin' la Pura Vida - 3.86
Homer's Adventures Through the Windshield Glass - 3.84
Treehouse of Horror XXXI - 3.84
I, Carumbus - 3.82
Step Brother from the Same Planet - 3.82
Bart the Bad Guy - 3.81
I Won't Be Home for Christmas - 3.81
Steal This Episode - 3.80
Uncut Femmes - 3.79
Homer Is Where the Art Isn't - 3.77
Girl's in the Band - 3.76
Homer Scissorhands - 3.76
Carl Carlson Rides Again - 3.73
Mr. Lisa's Opus - 3.71
Poorhouse Rock - 3.71
Sky Police - 3.70
Homer the Father - 3.69
Postcards from the Wedge - 3.69
A Totally Fun Thing That Bart Will Never Do Again - 3.68
The Good, the Sad and the Drugly - 3.68
The Great Simpsina - 3.68
The Food Wife - 3.67
Fland Canyon - 3.67
Dangers on a Train - 3.67
(Anything in that highlighted bubble group could easily slip out in next fall's recalibration.)
I suppose, on the surface, these results are pretty similar... which I'm admittedly surprised by. Once again, we have 6 clear Lisa-centric episodes in total (one with her in a proxy role). Two of these are on the fringe of getting culled, however (Simpsina missing the cut next fall is super likely) with Girl's in the Band on the edge of the safe zone. We also have some additional Top 50 Lisa-centric bubble episodes like Daddicus Finch, The Marge-ian Chronicles and Lisa Simpson, This Isn't Your Life.