The number of people who didn't pick a political party dropped seven percentages points compared to August (35 to 28).
The Liberals and Conservatives picked up three points each and the New Democrats picked up a couple of points. The changes don't add up exactly due to rounding and the slight inexactness of recalculating the original distribution from the numbers released by Narrative.
In the Narrative version, support for the parties stayed the same among "decided" respondents.
The pretty chart shows polling four the last four years all presented as a share of all responses. You can see the undecideds have been on an obvious and steady downward trend since earlier in 2019. If you toss out the March UND number as an outlier, there's still a drop from the time of the election.
The fact that all three parties grew in the last quarter by the same amount - more or less - is curious. Choice for Premier has remained roughly the same for the past year as has satisfaction with government's performance.