How do I extend my METV in Thailand and what are the new regulations affecting it?

The new regulations only affect the visa exemption. Yes, on METV you are on an actual visa, 60 days per stay with eligibility to extend 30 days. 180 days total in country during the 12 month duration of the visa.

With the change from 60 days to 30 days being iminent, does this now affect the duration of the METV will you now only get 30 days + an extension or will the 60 days still + extension still apply?

Yes.

Before I moved here I used to come to Thailand 2 or 3 times in a year, in over 20 years only asked once, "Why You come to Thailand so much?" My answer was, "I Love Thailand." Immigration officer smiled and stamped My passport.

What did you hear about extending it? I extended a METV two times in a row with no problems whatsoever.

Every entry gets you 60 days which can be extended for a further day so, if Immigration allows, you can get almost 9 months in Thailand if you exit and re-enter on or very close to your METV expiry date

Yes plus can get 30 day extension

The visa is valid for 6 months from the date it is issued. EVERY SINGLE ENTRY you make into Thailand during the validity of the visa will give you a 60-day entry stamp. If you enter Thailand on November 15th, you will get a 60-day entry stamp.

Some people get about 9 months out of an METV.

60 day entry + 30 day extension

Leave and return for 60 day entry + 30 day extension

Just before the visa expires, leave and return for 60 day entry + 30 day extension

Do be warned though that some people have experienced questioning upon doing this too quickly and the immigration offices asking why a tourist needs to be spend so much time in Thailand.