I notice better wifi connection. More responsive wireless network discovery and connection to one.
Since 2.3.4 is available from Wotanserver as well therefore the update is not a leak of some weird kind. So if USB-OTG does not work that is cancelled feature or a bug.
Can't test USB-OTG myself... yet.
SE seems to have learned something from this forum, 2.3.3 did not had 122 Mhz speed available, now it is.