Maybe it's just me but I have not found the P/Z TATL fares to be as attractive this year as they have been in the past. Moreover, I do not recall them being advertised as they used to on AC.COM. There were some decent fares to Italy (about $2500RT) that were available until the end of April, and then the early March sale to most of Europe for fares between 2500-3000, but everything is running around 3000RT right now - which I think is somewhat of a bargain compared to winter fares, but not as low as we have seen summer fares in the past (I remember a RT to BUD from YOW two years ago for less than $2500AI and VCE 3 years ago, with a stopover in LHR for $2000AI)
Most of the advertised sales as of late have been mainly Canada/North America Y, and a continued focus on Quebec/Ontario flights, with that sale extended until the end of the month.
I too I am hopeful for some TATL bargains toward the late summer / early Fall but with many US airlines cutting TATL services next winter, it could be a case where supply becomes relatively tight (and prices remain relatively high)