This should now be possible. Thanks for submitting and voting on it. 

Update : Segment had not been deleted but was inaccessible because the segment in question had not been shared with user editing the request. So in addition to the above request the error message should make a clear distinction between not shared segments and deleted along with being able to identify the segment in question

Justin/Ben - I hope this is still on the roadmap, whilst recent update allows for row count of selected dimension report, it's not ideal/great ... eg. by site show no. of unique article counts along with a percentage that did not specify author1. For this to work specific dimension report along with a standard metric has to be selected ie. having to request data (aritcleids, and standard metric) that aren't to be used/shown2. Can't correlate ie. in this instance we'd want articleid (dimesion) co...

With the latest release of calculated metrics you can now create segmented metrics for new or repeat visitors (you can define them however you want, most people define it as visit number > 1 and visit number = 1). This can then be applied to any report.

With the latest release of Adobe Analytics we have added both a description field for calcualted metrics as well as an easily accessible metric preview that gives users quick access to the definition, name and description.

Segment creation should support less/greater than conditions for Counter eVars.. for ALL products not just data warehouse. Kinda defeats the object of a counter eVar if you then can't create a segment on numeric value conditions.

I would also add being able to filter on referring domain instead of just visitor domain would also be helpful. We've gotten a lot of bot traffic in the past from semalt.com, now we're dealing with buttons-for-website.com, some make-money-online site and so on. It would be easier if we could enable filtering on domain rather than having to block at the server level.