The development blog for the DoD expansion went into detail on the changes in GoS "Weekend"!(...is that really the name? Also, you can click that for a japanese link.) As before, since most sentences are very short and concise and the subject in question is clear, most of it is very comprehensible through google translate, so lesse here.
>Easy ModeYou can switch the game between Easy Mode in settings whenever you like. So, for example, you could play the random battles in easy and do all the bosses in the original balance, or vice versa, or just turn on Easy Modo for split stages or whatnot.
>Drop Rate Up-Equipment drop rate has gone up a little.
-While it's only a little, it's actually a considerable change.
-Material (Such as iron ore) has a significant improvement.
-??? (They might be saying something like "since monsters drop more, we're giving you less from treasure chests", but it's too garbled for me to tell.)
>Alchemy recipes are changed significantly-30 iron ore is no longer necessary for the Kusanagi
-??? (Overall, the system is much more loose, aka less materials needed for things overall?)
-??? (The high tier character-specific armors take less of the uber-specific materials?)
-Since this is coupled with an increase in material drops, things are now quite easy to make.
>Miscellaneous-Font color is changed for when you hit an enemy's weakness
-Low-levels characters gain much more experience
-??? (Characters do not all join at lv1 now?)
-??? (Something about effects. Also vram usage is 1/4)
-Minimap added
-Items are obtained as soon as you get them, do not have to leave the dungeon to obtain, no item loss when you die