If I’m following you correctly (and I hope I am, otherwise I might need more coffee 
), you’re saying that since we haven’t uploaded much test TTL data recently, it makes sense to keep rolling out the flat file solution so that at least new TTL data gets registered properly. The old TTL data will naturally expire over the next few weeks and should be easily handled by the garbage collector. If that’s the gist, then I’m on board! 
It’s just a shame that the chained solution didn’t make it into this release—especially since it’s been on the radar for weeks:
But on a positive note: at least the flat file solution is released! 