+1! Also finding a way to tell us which DE's are in use by rules/tools would be hugely benficial!

I agree with the don't measure DTM from DTM side. Use a RUM or similar tool for measuring page load. However, giving us an easy way to pull a page load time into analytics can help us figure out what page load times convert client's relative to other page load times as seen by DTM.

This limitation has bitten me a couple times and always on SPA's where I need to have link click tracking as well as page loads when the hash changes.