Interestingly, 1inch is implementing a similar non symmetrical treatment of slippage towards its users.
This has become a way to accrue value to the protocol without explicitly stating anything in advance to the user.
Interesting point.
So, are you thinking of something like revenue sharing between the protocol, solvers, potentially token holders etc, instead of just solvers fully owning this positive slippage?
In general, not having it symmetric for solvers does create complications when it comes to deciding optimal solver strategies, and makes risk-management on the solver side even trickier. But, I am definitely open and interested in hearing about alternatives, if those add some value.