It seems good to me that the STRK token is used as a fee token, it just seems strange to me to have a payment duality (ETH & STRK), it is extremely important that the oracle has the most up-to-date data possible, since it can cause losses for the users. network participants, as you may see occasions where there is a price mismatch between ETH and STRK.
Personally, there should be a mechanism that benefits the use of STRK more, there may be duality, but what prevents me from only using ETH and thus not giving value (as a token fee) to STRK?