As noted above, looking at the filings on EF, it appears they just boosted S and W fares and then added new L fares at the old S fare price points. From ORD-TPE below, there is a bigger jump when there is no L inventory to the next fare (S class) -- $774 to $1020 instead of $774 to $920 for cheapest BE fares on a RT basis (a $50 increase each way).