I will fix 1, 3, and 4.
2. The new batch dialogs were designed to minimize the buttons in the dialogs, so if you want to search/replace only one item without batch, you should click the “<< Batch" button to collapse the dialog to the normal size. You can still access batch list items by clicking the ">” button, and select “Select from Batch List”.
The new design allows you to easily change options for some or all batch items, or change the “Replace with” string for all batch items, which I remember you also requested in another post. The design is similar to the Advanced Filter dialog.
5. I have not implemented “Select All” (Find dialog), “Replace” (Replace dialog) and “Extract” (Find in Files dialog) for batch. I might implement these in the future.