Also,
1) Who is Mia, Velvet and Jules?
2) Besides the +1 i get from talking them during breakfast/dinner, does anything else matters/happen during those times?
3) How can i buy the green herb and knuckles from Merchant?
4) Besides the Merchant, Halloween and Lucile's / Vera's events, are there any other events outdoor?
1) Mia is the MC's (Main Character) step-sister (although there's only 2 scenes for her atm.) Also, if you don't mind the spoiler...
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Velvet is a thief and if I remember correctly part of a gang and Jules is a police officer trying to get a promotion. You'll meet these 2 in an event during a stormy night. Currently their story hasn't been fleshed out (probably until 0.13+) so up to 0.11/0.12 you'll only encounter them once.
As a side note, the Velvet scene involves Bestiality so if that doesn't ring your bell you can deactivate the option in-game. Just get up in the middle of the night, activate the chair in your room and then interact with the teddy bear. The only down about it is you'll skip the scene.
2) It would depend on both the MC and their respective levels. I'd recommend that if you already unlocked the option to "Spend the day with...", just spam all the options until you reach max level (a red text will appear once you do). It works for +5 points per use. Once you maxed out the characters level you can go about your day talking to them and finding more options to have "fun" with them.
3) So far those are dummy/useless items, you only really need the pills. The herb would work as a healing item but there's nothing to hurt you and the knuckles are a weapon which again, have no use since there's no combat. My guess on why these exist it's because of RPGMaker in itself since, well... it's an RPG Maker tool xD some aspects within the software can't really be changed or removed.
4) As far as I know for 0.11 only outdoor events are the Halloween one and you could say Vera's state event is one too (Lucile's state event happens on the studio). For 0.12 there's a Christmas Event planned.
As for the next update we're uncertain of the date, since the good Doc took a few days to help him get out of the burnout he was in. It has taken a while but taking in account it's gonna be a big update I'm not really surprised it's taking it's time in the making xP