Successfully changed without reprice:
IND-EWR, UA Y
JFK-FRA, LH J
FRA-BKK, TG F
BKK-SIN, TG J
to:
ORD-YUL, UA J
YUL-MUC, LH F
MUC-BKK, TG F
BKK-SIN, TG J
Including date change for all segments. Originally booked Jan 30.
At first I was unsuccessful when the itin contained >4 segments (consistent with reports for one way US-Asia via EU, but wanted to try my luck); the agents and supervisors could not get around the reprice. I ended up dropping the short flight that takes me to ORD, and ta-da.