I'm mainly saying that it would be easier for people to accept new taxes if that was the implmementation (and specifically taxes like wealth tax that are ostensibly "to decrease inequality" and not "because we hate the rich").
But if you actually look at the rhetoric around it, the right wing party that's in opposition slams it as being a "cash grab" and a "tax on everything" that makes life more unaffordable for everyday Canadians. Literally one of the main planks of their platform this election is scrapping a revenue-neutral tax in order to help Canadian families "get ahead".
So was there any value in going to the trouble of doing the rebate? AFAICT claiming the tax was revenue neutral mostly just opened up the gov't to a ridiculous semantic argument about whether it was truly revenue neutral given that sales tax was being applied after the carbon tax. Maybe it would have been easier to just impose the tax and then pair it with an income tax cut or some kind of investment in existing social safety net programmes?
The other issue with the pots system is that it can give people a false sense of entitlement about things which benefit them. For example, consider the commonly-held belief that gas taxes pay for all road and highway infrastructure, and that roads and bridges wouldn't be falling apart if the government would stop "raiding" the gas tax pot to pay for other things. This is trivially googleable as untrue, but the pervasiveness of this belief blinds motorists to the reality of how much their preferred mode of transport is subsidized.
So people in this mindset approach a discussion about something like subsidized train fare and it's hard for them understand why it's a good deal for society.