Sub-Nautica does some neat stuff with sharing their roadmap as well, and they don't over-hype it. Often hype is just teenager/ young adult foolishness in thinking what they imagine in their head is somehow going to be exactly like that in a video game running on their PC.
Doing something like the Trello development roadmap for Subnautica might be an improvement. Or it might just start even more flame wars as the playerbase further fragments and argues over which future features should be prioritized, which ones should be delayed, and which ones should be dropped.
I think he devs are doing a better job communicating on the development of this game than most I've seen.
All that being said...
Please PLEASE do not look to Star Citizen for how to make this game better. While SC may turn out to be a fantastic game, if it ever reaches a release point, it has marred by over hype, an unrealistic development timeline, and bad choices like all their pay to win ships sales.
I came to THIS game EXTREMELY wary/reluctant because of the whole Star Citizen mess. My cousin had been chattering about SC for years, until it became a joke. He also backed this game in beta, and has a lifetime pass to ED... and he still hadn't played it by December 2015. He finally got me to try it, using his account. Within 48 hours, I was hooked on this game/game world and I bought the game myself a few days later (and then he started playing as well).
This game hooked me, over the stench of the SC development process (again, the game may be great someday, but everything surrounding it is toxic right now), and over my experiences with the original Elite (which on my Apple IIc decades ago, were not great). Everything about Elite Dangerous seems mature - from the development roadmap to the universe itself. For example, the cockpit GUI and cockpit design is functional and nice looking, without looking like it's there for show.
Anyway, I don't know what else to say other than please don't look to SC for how things should be done in ED. Star Citizen may be a great game if/when finished; I truly hope so (even if I don't play due to the pay to win mess). I don't want to bash SC or go off on a which is better tangent. ED is unique and good and... playable right now. SC may be good someday. Just please don't look to the SC development team for what to do here.. please.