I guess, date picker would be a very very nice addition. I have few custom date fields which I had to design using text input and many of my members really hate that. It'll also be useful in ensuring same date formats across the board.
Date picker and rating are in XF2.
I hope to see the fields below as well. As it may not be obvious to everyone what those are I have added an explanation:
Address autocomplete with Google MAPS
This will make it easier for members to fill in locations, or any place where a location is desired.
Pros & cons
A simple listing of a number of values Pro's and Con's. Here is one implementation:
Only show field if a criteria is true. Similar to how you set notices to display based upon criteria.
Likert scales. This is very similar to a rating field:
Example 1: calculate the average of all rating fields on a page.
Example 2: calculate the duration between 2 date fields.
Link the fields on pages or nodes and reuse the value of fields. If the value of field 1 changes, then the value of field 2 changes accordingly. You would be able to create a relational link between nodes, and you could opt to show which relational fields link to the node.
Example: Say you had a node to list actors, and a node to list movies, and you created a relational link on the actors node to fields that show which movies they star in; now when viewing the actors field on the movie page, it will show you a list of the actors.