I'll add my voice to this. Currently I build a trend view in Excel. The benefit of this vs the marketing channel is for clients that don't or cannot setup to use that report. It's a more automated solution.
I've run into this wall several times. Not just dependency, but it would be nice to support light branding as well. Login during the checkout process comes to mind.
Having the URL would allow for a lot of troubleshooting capabilities, rogue tracking codes, bad parameter passing for campaigns (site parameters, not like cmpid), landing page issues (coding), etc.
I would add that we need to have access to the user agent string within DW as a part of this request. While the roll-up stuff is nice, sometimes you're trying to trouble shoot something, or have such a specific question, that you really need to have access to the user-agent string. This really cam...