Thank you for your reply, I just got back from a short vacation and saw this.
I see.. so the inventory system is to promote strategic decision for players.
Yeah, auto-distribution system is not the correct solution for this, but an "easy" mode so that each member has access to all items in the bag may be a "nice-to-have" feature further down the development. But since you want to promote strategic decision, of course you can also omit this *easy* mode suggestion entirely.
On the other hand. to make players care more into learning each party member's strengths, I would probably suggest making the party members much more distinct from each other (visually, in sprite shape and animation). I suppose this is already an item in your to-do-list, just haven't gotten into it yet. But I believe nailing this early would be critical for the game. Please think of this just as a friendly reminder.
Cheers! Looking forward on the next update.