It sucks we don't get new events in blitz with each new run. Riot then wonders why modes fall out of popularity.
For this run of Nexus Blitz, we're starting it knowing it didn't get enough attention, but that will be taken into account when looking at the data. We, simply, ran out of time but changes are still planned.
Nexus Blitz is not one of the more popular modes to begin with (OFA and URF are the current reigning champions there), at least in terms of % of people played or how much folks are playing. For every release so far that has been true. But it's also not unpopular so we are interested trying more on it. :)