what exactly does this patch change?
it it just the monsters hp?
would be cool if u could explain with details what was changed :-D
This patch change parameters for HP, STR, VIT, MAG, SPR, SPD and EVA, not only HP (but I think some of this parameters, for monsters, are different - there is DEX and INT (Dexterity and Intelligence), I think instead of SPD and EVA).
In the medium level of the patch, parameters are raised by approximately 30%, in hard by 60–70% and in extreme by more than 100%. HP is an exception, this HP are changed intended, by adding some value to the 3rd and 4th parameter.
For what? When the team are on 50 or more level, their stats raising very quickly (by junctioning) and standard value of HP are low (Ultima Weapon killed in 2 turns). In the beginning of the game I recommend play on Medium difficulty

After the Dollet mission you can change the level into hard or extreme (not recommended though).
But I play the beginning of the game with hard difficulty and it's possible - but I have to draw more and USE more magic

Are you going to the Fire Cavern? Fight with some Glacial Eyes and get Blizzard