>>56468170I am currently playing through and mostly enjoying UltraSun.
My most clear complaint so far is that the world feels fairly small and simple.
Routes are short and straightforward, grass is almost always completely avoidable, "secret" areas are few in number and incredibly obvious, and environment variety feels incredibly homogenous and underutilized.
You never really feel like you're exploring a big, open area. You never really feel immersed in a route or other location. About halfway through so far, there hasn't even been anything even as memorable as Viridian or Eterna Forest.
Still liking it, but if something doesn't change soon, then I can see where the complaints are coming from.