Erina is not too bad, I felt her introduction was done very similar to Sakura's in that it was the worst possible way to introduce her, but felt she had plenty of room for growth. It's a shame that we rarely see her from now. While it's obvious she is the Main Female lead, and very likely to be the girl the MC will end up with, she is not in the manga that much, she might not even be in the top five for most screentime for a female charactor.
She's more like the final boss I guess, The one person he wants to cook for...like his old man said.
Well, I hope I grow to like her more as time goes on.
I'll prob read the manga when the anime is over. The fanservice/foodgasm won't bug me too much since it's just one panel/one page.