I happen to disagree.
Played every ISS/PES there has been. Loved many, hated many.
Though the feeling of awe I got back in the WE6:International and WE7 times is a memory I hold very dear, I appreciate that, with its flaws, PES 2014/15 allowed me to build plays and dictate the tempo of the match like no game before.
Progress has been made. The game has a greater depth. I have not tried 16 yet, but am very much looking forward to it. PES 6 hit a sweet spot of gaming dynamics, but is much further from the real footy than these latest games are. And it was too with its exploits and bugs.
I remember back in the time we would be happy if the next PES brought a handful more animations, a couple new mechanics and some licenses. Now we put every inch of the game under the microscope to nitpick it's flaws. And honestly I believe we sometimes drive the Nokami guys crazy with our feedback. I happen to love PES2014 for its realism, yet it was panned by most for its depiction of player weight and inertia. I wish we had been more patient and let Konami explore that direction further, yet the community screamed "bring PES 6 back" and we got arcadey PES2015.
I don't know what to expect anymore...
I have to agree with what you said about Pes 2014, I was still playing it up until the pes 2016 demo. I honestly believe that they should have persisted with it instead of going backwards with Pes 2015.
Alas it's gone now and we have to get used to the new style of game. Just hope it doesn't slowly morph into Fifa. Still and all really enjoying the demo and looking forward to the full game.