Well, this how Pokemon games have been since back on Gameboy. It's the same thing, over and over.. You go to a town, you battle some people, you find some stuff, you leave town and you catch some Pokemon and you battle some people and then you find some stuff. It's not all that different, it's just that fad players are getting bored with it because they never played all the other games.
Only in the same sense that Heavy Rain boils down to "you watch a cutscene, then you do a quicktime event and watch more cutscenes followed by more QTEs". Technically it's true on a certain level but it misrepresents the game and its appeal.
Your typical Pokemon game is focused on growth; you have to carefully build a team that can take on your opponents and you can't do that by constantly tossing out your 'mons. Training a 'mon up requires some time investment, thus you actually need to plan ahead instead of just going with whatever. Also, the various attacks actually make a difference and make the fights more complex than just "keep attacking until someone faints".
PG, on the other hand, has none of those elements. It barely even has fights and those fights don't really amount to anything. The meat of the game is literally to catch 'mons which become utterly useless shortly after when your level allows you to catch superior 'mons. There is nothing to achieve, no growth of any kind, no strategy or tactics. It's Pokemon without everything that made it interesting.
(And this comes from someone who was never a particularly big Pokemon fan and only played one of the first generation games. Even I can tell just how much PG is missing compared to the main series.)
The party adjourned to a hot tub, yes. Fully clothed, I might add. -- IBM employee, testifying in California State Supreme Court