We can now import a 90 day personal supply worth of nicotine laden eliquid, as long as it doesn't advertise or state that it has health benefits. This essentially means we can import juices from the US.
I believe the max allowable concentration for import is 60mg/100ml, but I may be incorrect; someone else will have to chime in. But even with that, we can still get high concentration nicotine bases locally.
In my province there are two restrictions coming in that are significant:
1) No promotion of eliquids (i.e. you can sell strawberry eliquid, you just can't call it 'red skittles') -- i'm actually fine with this. I think it's reasonable.
2)
vaping is no longer allowed indoors in vaping shops, meaning people can't sample. This one is contentious and I can see it changing.
Post and border services (Canada Post and CBSA) are federal -- provinces won't have any say in the importing of US eliquids. Or at least no way to control it.