To be fair, I think that the companies are very aware of how their styles are perceived by their customers... it's just that they all have a slightly different customer in mind! The very same style which to a skilled player might be seen as too busy might be the perfect amount of assistance to a less skilled player.

Overall, I've always felt that Roland's styles, which seem a bit barebones to many here, are the perfect amount of room for someone determined to PLAY as much of it as they can. Yamaha and Korg, OTOH, seem a bit more determined to play much of it themselves. Of course, you go back to older legacy styles, or user styles that all seem to be fairly stripped down compared to modern arrangers' styles, and you are good to go.

But just like there's no one perfect REAL rhythm section, it's all about the gestalt of the whole thing, not just the support for the keyboard player, different people are going to find the exact arranger style thing quite different depending on how they play...