i am broadly in support of this, and while i would not consider it to be a ballot issue, i would warn opposition groups against making yourself come off as being in favour of puritanism, temperance or islamism by trying to make it an issue. conservatives won't vote for you, but leftists are likely to react with cynicism and disdain. conservatives are supposed to be the ones making it harder to get alcohol, not leftists. if this issue realigns, so that liberals or new democrats are seen as supporting increased restrictions to access alcohol, it will result in drastic harm to the left in the long run.
the only serious problem i've ever had with access to alcohol in ontario was that things are closed on sundays, and the previous government mostly fixed that. it's a solution without a problem.
so, while it's not a ballot issue, a reaction against it might become one, in the sense that i could see myself voting green if the liberals and ndp decide to be "progressive" about it.
half of me expects the ndp to take the puritanical road of christian temperance. that is the ndp's history, after all. if they do, this could potentially be a strong wedge issue for the liberals. but, they have to take the right position on it, first.
https://www.blogto.com/city/2019/06/ontario-beer-sales-convenience-stores-official/