Superheating used to be a great profitable, click intense training method for low smithing xp and magic xp. The tick rate seems to be reduced and a message prompt displayed anytime you try to oversample the superheat spell. I noticed superheating within the workshop uses ores from the ore bank and only requires a single runite ore in the inventory. I don't understand this change. It seems to me the reason for the change in tick rate is strictly related to the fact that it requires no mouse movement. I think it makes far more sense to remove the ore bank withdraw while superheating in the workshop and revert the tick rate. I tested this with an ore box as well.
Currently in the live game you can reasonably superheat 2000 rune bars/hr for a total of 106k magic xp and 100k smithing xp. In the beta I'm only able to reach 75k magic xp and 20k smithing xp with high effort filling my ore box and superheating at the bank (this would increase ~5% in the artisans workshop). I should note that superheat form at a furnace requires no clicking and uses the live game superheat rate while using no nature runes or effort. I believe superheating requires only one change which is to make it in line with the superheat form smelting rate.
I'm not opposed to the update in general but I don't understand why superheat is being neutered.