I have no preconceived opinions on Iris. My opinion on her character is solely based on what I've observed, and whether or not the direction the writers are taking with her character is fulfilling the role the writers want her to play on the show and whether it makes me care about the character. So far it hasn't on both counts, for the various reasons I've already stated. The writers are gearing Iris towards trying to create pathos, but by making her already very capable, knowledgeable, already possessing the qualities of a Dragon Master, with none of her problems stemming from her which heightens the sense that she's perfect and waiting for her pokémon to start listening to her because of how much of a great trainer she is, with everyone liking her and not calling her out on her flaws and mistakes. Yet, with all this skill and knowledge, the writers are just having her stand around watching Satoshi save the day, playing medic, and just not being all that proactive except defeating low level mooks and the one Evil Chick, who of course has no redeeming qualities and is totally evil. They're just no story, no developement, and ultimately, after seeing all of those elements pile up, and seeing what could have been a very interesting character reduce to this.
Long story short, the writer's choices in regards to Iris's character dictate my opinions, not the other way around.