well, the content you seek for between dungeon and savage is already there : normal trials, normal 8man raids, 24man raids, and even extreme trials fall into the category (albeit in the higher end of the chart)

if you want to blind run, just create a pf...
for next content, just don't late on the hype train in the first week of content, usually there's plenty of blind run on the first week or so (you could even find some of those blind progger in df ! )