2) Where there is no inline editor in the Product Grid (like in Customers or CMS Pages grid)?
3) Why grids display mass-action dropdown even if nothing selected? I think it would better to display mass-action dropdown in some pop-over in floating position, and only if some items are selected. It would make grid pages cleaner and easier to use.
4) There is no need to display pagination block if there is no need to. For example, if I have <20 items, pagination can be hidden.
5) Bookmarks should be always visible and accessible at just one click.
6) It should also be possible to change the order of bookmarks.
7) Our developers said that new magento grids are complicated to customize. It is difficult to make cell value a link or apply some CSS to a cell.