Friend improvements
1) The buffing system currently is really slow. For something this integral to the social feel of the game, it'd be nice if this could be much more fluent and responsive.
2) Friends can currently replenish Fish and Meat deposits only. It would be nice if they could replenish or replace exhausted Fields and/or Wells as well.
Chat Window
Possibly more of a bug than of a suggestion, but it possible to expand the chat pane so much that its border falls out of the screen. This means you can't exactly reduce its size back to what it was without relogging. Making the top of the window 'solid' so the chat window can't grow out of your screen could fix this.