It's difficult to say given the sheer size and task they've set themselves.
By comparison:
GTA V took a team of 1,000 people 5 years and $125m+
Shenmue - 6 years
StarCraft II: Wings of Liberty - 7 years.
L.A. Noire - 7 years
Spore - 8 years!
Team Fortress 2 - 9 years
Prey - 11 years
Diablo III - 11 years
Duke Nukem Forever - 15 years ... but DNF was garbage so it doesn't count
SC which utterly dwarfs any of these, has a team of 1,000(+-) people, are making two games and they in early-mid Alpha at 7 years.
Development will take as long as it needs to. That said, the more money people give them, the more they can get done so the longer they can stay in development. Pull that funding and they'll need to quickly cobble something together for release and use a more sensible approach.
Sure, you can compare with examples of long development time. Can we do the reverse?
No Man's Sky - 3 years to release, building an engine from scratch, and has over the subsequent years has added loads of new content, with a tiny team, and the scope of that is pretty decent.
Saying "yeah, its bad, but there are worse" is not a great defense.
Also pointing to the imagined scope is also not a great defense. CIG have promised a lot over the years. There were a whole boatload of 10FTCs where CR basically said yes to just about ever hair brained thing everyone asked for. They wrote pages about gameplay mixing drinks and selecting in-flight movies for NPC passengers.
The potential scope for SC is not only unrealistic, but implementing even most of it will potentially take decades.
Therefore its better to consider, what scope needs to be implemented before they can get a release? To get the game out of alpha and to the point where it becomes a purchase and not a pledge. The point where the average gamer who is interested will be happy to slap down $60 and feel like they have got something worth their money.
Of course, it makes sense to forget about things like Pets (one of the final stretch goals), the hundred+ systems (half a dozen might be acceptable), and of course, multiple gameplay loops that work. It also goes without saying that it should be relatively stable.
This would be but a fraction of the imagined scope, but good enough to ship it.
How many more years will it take to reach this point? Certainly not before the release of SQ42, which is currently getting most of CIG's attention apparently. Is 2022 realistic for an MVP release? Possibly?
10 years from kickstarter to get it out of alpha and into a releasable state?
How's that compare with your list?