I'm in chapter 6 now.
So far I do not see the hp/stamina increase. And the inventory space in limited. Right now my gold is max so every enemy I met and just left them untouched because I couldn't carry anymore.
The game is quite good ( I tend to judge FPV games highly
). though mostly you'll be exploring the outside/wilderness. There's no dungeon to explore in this game (so far). Since your hp/sta is fixed. Getting injured during battle can be very dangerous because of the lack of healing pot ( if you are reluctant to spend your money like me
). Also as powerful your magics are you are somewhat limited to using them because they drain your stamina and will be the death of you if enemies manage to hack your mage.
The annoying part - The night/day seems to go too fast. And before you know it your party are tired and need to rest. Oh, the amount of illegal operation I get in this game is starting to get on my nerve.