I dunno about Qoga, but Ar Tonelico 1 and 2 were pretty damn good games in my opinion. Honestly you don't go into a Ar Tonelico game for fancy graphics or a super awesome story, more for the great music (Depends on your taste in that case, but all the games have several full songs, many partially or sometimes fully sung in Hymmnos) and the fun gameplay. But once again, haven't played Qoga. The intro wasn't exactly that great from what I could tell, but each game has taken place on a new "tower" and there's a shit-ton of stuff that would need to be introduced for a "newbie" to actually understand anything of the series, so not surprised people are confused and blindly jumping on the jrpg hate band-wagon.