Yeah, we’ve been moving towards something like that by putting things onto #roadmap:to-do as they become fleshed out and eventually accepted.
Make Supernova Qezian-only again is a good example. It sat at the top with 19 votes for awhile, but it wasn’t until Race Versions was identified as a larger technical dependency that it could get onto the roadmap. Right now, that feature has 0 votes.
That means that 19 players helped get a “yes, will definitely do this” but 0 players have said “now that this is accepted, we want it more than we want other things”. Both parts are important, but for different reasons. There’s likely a lapse in understanding here because this is so new, and I haven’t yet prioritized explaining things until this post.
Anyway, as I mentioned earlier, there is value in having players make the tough choice between features because it empowers you to help me do the same thing but much earlier in the process. I would say that “whatever, this is not going to happen anyways” is probably better stated as “whatever, i want this other thing more”.
We’re pretty much doing exactly what you’re suggesting. The system isn’t broken, just very slow. In the meantime, players can feel stuck, but this is important because it represents the same “stuckness” that I also feel. If we give players more votes it will just give them a false sense of progress and overload my dev queue. Then votes will feel worthless, whereas right now they feel like they are in short supply. We don’t want vote inflation. 
What should happen instead, is that players regain a vote as I complete a feature, and they can then apply that where they want and the roadmap refreshes itself in a more focused way than if everybody had unlimited votes, or even just more votes. Limited votes = focus.
This is all a big step up from just having an ideas forum, and that’s not even including the role of the new Think Tank, which is also still being defined.
Regardless, I appreciate you guys giving feedback and asking questions. You and others expressing an increased interest in the roadmap is a great sign!