Don't see much problem with this except for tourists who will probably get a lot more tickets due to not finding a parking meter and then just not paying.

What I do question though is:

In addition, a new option may be introduced, allowing motorists to settle parking fees in cash at district parking offices. In such cases, drivers must pay a fixed three-hour fee within 24 hours; beyond that, penalty charges will apply

This new way of paying in cash just seems to invite people to park and then if they get a ticket just pay within 24 hours at the district office for their normal fee, and dodge the fine that way. And if there's no ticket they just go on their merry way not paying the fee.
Similar to the paper tickets on BKK with ppl quickly marking them when control hops on.

And also:

internal combustion cars weighing over 1,800 kilograms and electric vehicles over 2,000 kilograms will be subject to double parking fees

This 2000kg seems really light for an EV, if max weight for an ICE car is set to 1800kg, before doubling the parking price.
A Cupra Born (e.g.) is 1965-2005kg, so in some cases would be paying double.
Also wondering how they will maintain this for foreign cars, when it's unknown if the specific version is over/under 2 tons.