The latest, Path of Exile Synthesis League was launched just over two days ago. Synthesis had a massive amount of players during the launch, peaking at well over 176,000 concurrent players. This made the Synthesis League launch the second most popular Path of Exile League launch and it went really smooth as well. With previous leagues there were always high day one downtimes and huge log-in wait times due to many people trying to log in but with Synthesis these issues have seemed to be resolved. As players reported, there were no major server stability other than some login downtimes for the BR region.
After the smooth PC Synthesis launch, GGG is continuing with their release of the Synthesis League on Xbox One consoles which they said will happen at Mar 11, 2019 11:00 PM or at 3pm March 11th (PST). Downtimes for Xbox One players will start at Mar 11, 2019 9:00 PM (two hours prior to launch) in order to prepare for the deployment of the Synthesis expansion on the Xbox version of Path of Exile.
Along with that, GGG has announced that they will be introducing the Unique Collection Tab, ExileCon ticket sales and the Glimmerwood Mystery Box later this week.
Unfortunately, there is still no release date for the Path of Exile League expansion launch on the PS4 console, although GGG noted that they are also getting closer every day to having a firm release date for PlayStation 4 players.