normally I work with the octane render engine. One of octanes most underrated features IMHO, which is speeding up my workflow tremendously, is the ability to use a pipette on the rendered viewport to select a material. This is incredibly helpful, I use it all the time, it is a really a great companion feature for RT based render engines, since you can tune your materials in seconds without having to click on any items to find out what material they use, then select these in the material editor... you get the idea...
When I switch to enscape, I somehow feel like my arms are brocken concerning this aspect, so I would really like to see it here too!
It is a little hard to describe, but once you used it you dont want to go back...
best
Andreas