i know what you mean, jane. so far, ive tried to gently offer sippies with eo28 splash for 2 days and then alimentum for 2 days to ella. she pushes them away and wont drink them at all. i dont blame her. i gave her the eo 28 really cold (how she likes her water) and she just cant get past the taste. she tries but gags. it has such a strong artificial grape flavor, which as an adult i could drink, but for a baby it seems way too much. she took 1 sip of the alimentum and that was it! there's no way she could drink it at this point (maybe if she were younger) but it tastes so badly i spit it out into the sink when i tried it.
i was really tempted to just try organic cows milk formula because i eliminated it like 11months ago not really sure if it was a problem at all and never retrialed it. it was green on alcat, but so was everything else she reacts to.
Or there's the NT homemade formula recipe, which of course contain all sorts of allergens. But I think you can modify it, maybe try raw goat's milk or something... and who knows, maybe she will tolerate it!