I will be posting an RFC for changing minting/burning fees soon (hopefully in the next day or two). It will not include any proposal to introduce the continuous fee, as I believe we should avoid it if possible.
Briefly though, the RFC will propose an algorithmically self-adjusting fee that slowly creeps up until volumes are observed to deviate from the “norm” (measured as time-averaged over an adjustable period). At this point, the fees stop increasing, or even begin decreasing again (depending on how much deviation is observed, and how much inertia we want fees to have). The idea is to let the fees self-adjust and arrive at an equilibrium with demand.
I think there is enough adoption now to consider increasing fees if it is true that demand is high. However, without data, this is impossible to know. So, getting data is the first point of order.