as I understand it you get 180 days per year for 5 years and can extend by 180 days only once, in regards to how long you have to leave for that's the remaining 176 days of the year, so as it's multi entry I think many will maybe spread the 180 days through the year in 60 day chunks and visit home country or cheap neighbour country for the time needed out of Thailand
the reason it's 180 day per year is so that you do NOT become liable for paying tax in Thailand, although the whole tax details are a mess the 180 has been clear from the start
Hi all quick update, I got back on Saturday June 1st and got 30 days, I did question it and was lead off to an area with several immigration staff and they said yes it's been announced but it's not law yet, and now today June 2nd I see a story saying it will happen late June or early July, so will have to wait I guess....