If you're asking for my personal opinion, it's fine.
I can only refer back to the previous page's EBikeSchool.com YouTube channel. (By Micah Toll)
It's up to you to decide.
Generally, ebike companies do not recommend aftermarket upgrades.
When I tried to upgrade the brake to full hydraulic, they won't recommend it, which is a strange part because brake upgrades are common in non-ebike MTB world.
However, Juiced for example, said that their 48V controller is fine with 52V batteries. (If I remember correctly, even older 48V models even before Juiced started offering 52V)
In addition, Bolton and Electro Bike World both offer 48V controller, and they both offer 52V battery for that controller. Bolton said 52V is fine with 48V controller.
Who makes Himiway's controller?
Looks like there's someone who used 36V controller with 52V battery, yeah, the controller died.