Loaded save and most added techs were researched:
I really love this mod for the simple added narrative, so I was excited to see this one get an update. Played this for a bit on Nov 22 as Eataine. I researched a few of the added techs. I think 4 ish. When I loaded my campaign a couple nights later, almost all the of mod's techs were marked as researched, and it looked like a lot of them were active in the game. I loaded my earliest save from turn 2, and it was the same there.
Happy to answer any questions if this seems like something worth looking into.

I had about 50 mods active total in the manager, and I was also using WeMod for 1 turn build, 1 turn research, max control, and army recovery.

Not sure if this is helpful, but here is the exported mod list from WH3MM:
2861185989|2789898215|2789898126|2859968660|2789887182|2870464661|2826930183|2852892886|2790007728|2853055040|2869195078|2789854789|2798635540|2802810577|2802811244|2790566124|2789884957|2789881693|2789878031|2860059268|2853433455|2790490527|2789862740|2855837519|2789896451|2789903475|2853194971|2843411818|2861900776|2860045252|2852892733|2852682531|2854346056|2795421325|2789857945|2853431734|2853320471|2853320410|2853185162|2790774407|2859809362|2789937138|2854819509|2790444477|2859407744|2859783358|2856313886|2789863945|2815354316|2797742171

Thanks for the detail information. It seems to the recent update which alter building and tech require make it the old version not work properly. It should be fine by now. I would suggest you to unsub and sub again and start a new game to avoid above issue. Cheers

Everqueens will tech is tied to malevolent treemen and the passive spite ability doesn't work for the treemen you can recruit from Averlorn

Text errors:

Ancient Martial Tradition lacks a space between Dragon and Prince for the anti large description.

Reverse Diplomacy 1: Miscast is misspelled for miscast base chance.

Also, I_Hate_People's reported issue about Everqueen's Will boosting a unit High Elves can't get is still true.

I also noticed that under technology_effects_junction_tables/hef_ulthuan that hef_ulthuan_tor_elasor's public order bonus is set to have an effect scope of faction_to_faction_own instead of faction_to_province_own_unseen like you use for all of your other public order techs.

under text/db/hef_effects.loc effects_description_wh2_main_effect_tech_dmgvsinfantry_increase_hef_eagles has a typo "Bonus vs Infantry: +1%n for Eagles" so it shows as +110 in-game.

Under text/db/hef_Yukino_effects__.loc

effects_description_hef_yekino_upkeep says "Upkeep: %n% for Eagle, White Lion, and Dragon units."

The tech actually impacts War Lions, not White Lions.

Under db/technology_effects_junction_tables all of the tech_hef_dip modifiers (except the wood elf one) give +100 to one faction and -100 to another, except for tech_hef_dip_5, which gives -100 to both Dwarfs and Greenskins.

Was it intended to not have an ally faction for 3 (the wood elf one?

Also I noticed that db/technology_effects_junction_tables/hef_yukino > tech_hef_dip_4 is using wh_dlc05_faction_political_diplomacy_mod_wood_elves. Does it need to use wh_dlc05_faction_political_diplomacy_mod_technology_wood_elves instead?

Sorry if I seem overbearing. I'm working on it on my local copy and if I don't get the feedback out when I run into it ?I never will.

To get murder of spites working on high elven treemen, we need to head to:

db/unit_sets_tables and make a hef_treeman unit set.

Head to db/unit_set_unit_ability_junctions_tables and add:

treemen_murder_of_spites wh2_dlc16_character_passive_murder_of_spites hef_treeman

Finally under db/unit_set_to_unit_junctions_tables we need to add:
wh2_dlc10_hef_mon_treeman_0 hef_treeman

I know you already know how to do this, but I figure if I can give you something you can just copy and paste i might as well.