I agree that keeping the buy side of NBT under control is of paramount importance - even more important than keeping the sell side under control.
And exactly that - helping the buy side - can be achieved by providing NBT holders with a persistent incentive to remove buy side pressure.
It seems I’m quite alone with this view, but that’s ok 
My thinking in an overly simplified way is: nobody can save anybody from buying NBT at prices above $1, but Nu should always offer $1 per NBT when people want to get rid of their NBT.
In case the sell side gets low Nu doesn’t have a viable decentralized way of bringing NBT to the market.
There’s only the strategic reserve if quick action is required. It’s on a multi signature address. It’s decentralized and that’s good. But do NSR holders know who the signers are? Do they know how many? Do they know whether the signers are still available?
I acknowledge that it’s decentralized, but I claim it’s not viable. Such a grant should be made close to the time it’s required.
The seeded auction would be able to solve both the trouble with buy and sell side liquidity issues without involving parking interest.
NBT and NSR grants would be made available to seed either one side or the other of the auction - depending on which side needs to be propped up.
Unused funds would be burned, new grants would be made. This could be a cyclic process, maybe even on a daily basis.
That way Nu could effectively influence buy and sell side.
Nu doesn’t have that.
Brilliant ideas have already been written down. If I’m not mistaken, this problem (verified here) can be solved by seeded auctions as far as I understand them properly. Maybe @Nagalim can comment this.
NSR holders seem to be not interested in it.
Effectively only parking interest remains to lower the amount of NBT hitting the buy side hoping that people park if things are close to getting pear-shaped. NBT buy backs and burns are considered something special that happens only rarely (and only in even bigger emergency)
For the sell side there’s the hope that a NBT grant that passed on October 16th 2014 is still available when needed.
So I’m trying to make the most of parking rates.
I’d be happy to spend my efforts on a more sophisticated solution, but I don’t know how.