My Logbook suggestion (with the addition of interesting surface features, dynamic stuffs, ect) would be a reason for me to go back a second time, to explore other areas and see what there is to see. I only tried roving once and I hated it cause it basically a game of "I spy, with my little eye-" "a grey rock, I know already! We've done this hundreds of times..." if their were canyons, cool crater effects from volcanism, stuff like that to go visit and explore and take notes on, I would hit the Mun up every third launch. I can't even - - - Updated - - - What have you proposed as "meaningful things to do?" (I'm curious, i might've missed it)