In Glyphs 2 the preview line (at the bottom of the main edit view window) centered the text of the instance depending on the position of the cursor. This is not working in the current version.
And Version 2 would show the info box (with metrics and kerning values) even when there was a line break. You could change kerning and see the value in the grey box. It works in the current version to change the kerning value, but you can’t see it in the info box.