I assume there's going to be a lot of fuckery and if certain miners win that block, it won't even matter as they'll fill it with out of band transactions.
Discussion
it's all fuckery. rare sats my ass
Out of bands is only secret bidding. So there might be transactions that advertise to pay 120sat/vB but they pay the pool an extra amount of X to get it confirmed. They might even have arrangements to pay the n-th percentile fee of that block up to $$Y.
Now that I think of it, out-of-bands not only makes things opaque for users who don't know how much they have to pay to get next block confirmation. It's also opaque for miners that don't know how much the pool actually earns in fees. Both is terrible for decentralization of mining.