1:texture alignment on models, beeing able resize and moving them on the object.

I expected that one from the first day I published this feature. [;)]
Miserably the way a texture is mapped on the object depends on the texture coordinates set or not set on the 3D model of the object. Sorry but I think this kind of very complicated modification is not the purpose of a program like Sweet Home 3D designed for a general public audience first. You'll have to use an external tool to edit your 3D model.

2:some kind of highlighting when you edit materials on models.
i kinda always had to change the texture first to see wich part of the model im editing.

I wanted to make the selected material blink in the 3D preview. Please fill a feature request so I don't forget it in a future version.

3:a keyboard combination for direct material editing

How users could guess it? I'll add at least a F mnemonic on the button label, so users can access to the material dialog with Ctrl + E / Alt + F under Windows and Linux.