Thread by @bk2128

Turns out most if not all of the new FE3H info should be already available here: famitsu.com/news/201905/15…
It's so big so it's going to take a while to digest all the info, but I'll post the important ones right away

FE3H brand-new weapon: Gauntlets, under the Martial Arts ability level
Can launch 2 strikes by default; speed advantage (≧4) will make it launch 4 strikes.
But it cannot be equipped by mounted classes like cavalries & fliers.

The soldiers accompanying a character in FE3H are Knights that can be recruited from the Knights Guild. You can select the type (Soldiers, Mages, Peg Knights etc) and they also have their own levels. If you lose soldiers you must refill them at the Guild.

FE3H new feature: Stratagems
Can be used by a unit which has Knights under them. Limited usage amount per battle, but does not consume items.
Types range from simultaneous strike, raising movement speed, or even forcing an enemy unit to move

FE3H skill types
-Personal Skill: Fixed skill for that unit; cannot be changed & is unique to the unit
-Class Skill: Fixed skill for the unit's class. Will be replaced if unit changes class
-Ability Skill: Skills learned from Ability Levels. Available anytime & can set up to 5

FE3H has a Calendar system where 1 year > 12 months > ~30 days. While weekdays are used for teaching, you can do more free activities on Sundays. Various events are also scheduled from festivals to character birthdays (eg Edelgard's is 22 June)

In FE3H, one month acts as one chapter. The last day of the month will have a major battle that must be undertaken to advance the story.

FE3H protag has set amount of times to teach, stroll around academy, or sortie to optional battles. But as you do more activities you'll eventually raise your Coaching Level, which will also add the activity times allotted to you.

FE3H tutoring
-The above green-red bar shows how many students you can teach in a session
-Motivation (top right bar) is how many times the same char can learn in a session
-Blue up arrow: Character excels in them & the Red down is opposite of that
-Finger icon: Teacher bonus

FE3H ways to increase character motivation
-A pupil may come to you & ask question. Giving the correct answer will raise motivation
-Actions may be available after good/bad tutoring results (Praise / Scold / Comfort). Picking the correct one will raise motivation

In FE3H you can also set personal objectives for the pupil to improve abilities by themselves by time without your personal tutoring.

Sometimes a pupil may even come to you asking to be set objectives that have been decided by themselves.

FE3H Group Tasks
You can assign 2 pupils to do a task together. This not only improves the support level between them and raises specified Ability Levels, but you can also receive money & materials from the results.

FE3H Talent Blooming
Abilities that a char doesn't excel at (normal or even bad [red arrows]) can be turned to excel by continuing to give personal tutelage on that ability until there are 3 stars.
They can even learn a new skill with this.