Exactly my thought,he seems to slow the game down purposely/strategically just to put the final gear to finish the match in the 6th set...Maybe Ma Long knows that the will never going to beat FZD 4 straight game from now on (FZD is improving after 2015 World Cup of coz) or just to give some face to FZD..
Losing games is not a strategy. He just changed his approach towards FZD in the 6th. ML is not playing on his own, he has some formidable opponents against him who also try to outthink him, trap him and bring him to their own gamestyle.
What happened in the losing sets is that FZD prevailed and imposed his will and ML didnt adapt thats all. No secret strategy there whatsoever, ML is a problem solver and he realised what to do in the 6th
p.s. sorry but its hilarious to think that slowing the game down and not imposing ur will just to press the pedal on the 6th is a good game plan. It makes sense only for 2-3 points in a set just to keep the opponent guessing. We are talking about ML he always wants to play an immaculate performance.
To get a better picture :
There are countless times that ML has a comfortable lead against opponents (8-3 for example) makes an unforced error and he slaps himself