Thanks a lot for your feedback! The game as is was made in seven days with some evening work this second week, so it will need some time to mature, grow and "set" itself. There are still too few items I think, to narrow down the weapon choices.
But correct me if I'm wrong, but doesn't VS pick items randomly up until you've filled all slots, and then will upgrade those you have? And that's kind of the risk of a chest in the early game before you've leveled up enough to carefully pick your build? That's how I've read the mechanic while playing it, but I'm by far no VS master.
This game needs more items before I want to add any such restrictions, as there are only 7 items in the game right now. I suppose that I could add a higher chance for already owned items to get picked from the item pool on chest opening, but its also supposed to be more random than a level up and not a guaranteed boost to your current items. That said, I'm sure it can be tweaked to feel better.
All monsters shouldn't be faster, but some certainly are, maybe too many. I'll put this into my monster tuning notes for 1.5.
Thanks again for the feedback, it's much needed at this early stage!