I have been playing FFXI for 8 years now. I imported the game cause I wanted it so badly and I use keyboard only. I like having the keypad (on a full keyboard not gamepad) to move around with and using the arrow keys to control my camera. With my right hand, I can control all movement and camera function.

AS to point #1: Drag and Drop. I think this would be good but maybe not in the context that you are thinking, or maybe it is in that context. Within the actions equip menu, we should have drag and drop function to equip abilities and actions. This may be what you are asking for but from my first reading your post, it sounds like you want to drag the action from a menu to the main screen UI action bar.

As to point #2: main menu system. The menu side bar comes from FFXI. I'm ok with this except for the arrow keys being dedicated to control it. Other MMOs use hotkeys to access all the various menus.

I think SE should add an option for us to select the controller type we are using. The old keyboard interface from FFXI, the gamepad interface FFXIV uses now, or keyboard and mouse interface people are using. Players can use a keyboard on a console too.