Interesting. The most noteworthy changes to ITR behavior were the introduction of distance-based probabilities and a correction of how request sizes were rolled (see devlog).
The former causes very price-sensitive pax types to fade out over longer distances. If your product was very focused on price so far, this might give an advantage to more service-oriented competitors. Just a theory, though.
The latter (the fix to request size rolling) would almost certainly decrease the overall demand in Economy. Economy types are the most common, so they “benefited” the most from the subtle probability bug I described in the devlog.