Why do they "need" to liquidate in the next year or two?
Incidentally from what I can make of their investments in Uber on crunchbase, they need Uber's market cap to be $31bn just to break even on their investment (13% of the business for $411m). That's probably what they're fighting for.
0.13*31BN = ~$4BN, still a 10X return if they've invested $400M.
I don't really think the urgency is there, though, VCs have been dealing with illiquid companies for decades, if they need to wind down the fund, they will either distribute the shares directly to the LPs or create a placeholder SPV and distribute partnership interests.
Can't edit it now, unfortunately.