Hello and thank you for your extensive feedback. Many of the bugs you mentioned we weren't aware yet, so we'll investigate what can be done about them.
But pointing out a few things:
Merishya (Companion): We don't really aim to make a very complex companion system so I can't guarantee we'll put too much effort on improving that part. Usually when Kalyskah gets a companion will be a person to follow her around to help on a single quest or for a very short amount of time and because of that, improving the ally AI is not at the top of our priority at the moment.
Size of the map and enemies: Yeah, filling up the world will be a big challenge but we aim to add some random events and encounters later that might give a feeling that the world is more active, so it's on our todo-list. The checkpoint system might also help players to explore the area.
About the loot dropping where the enemy is killed, it's a good idea the one you gave. I'll see if we can do it soon.
I didn't understand what you mean with equipment priority but if it's a bug that sometimes items on the first slot wouldn't be equipped properly, we fixed it recently but didn't pushed the change yet.