I am glad you are giving the chick a chance. I also have an EE hen with a severely crossed beak. Sandy is a tenacious survivor, over a year old now, and even lays a small egg once in a while. Every morning I am in the habit of taking the previous day's leftovers out to the hens and I always have something special for Sandy. I have a special bowl for her, deep with curved sides, that she can scoop out of easily. She licks/slurps it up, then shakes her head and whatever has gotten on her face flys everywhere! She takes longer to eat than the rest of the flock, so I put her bowl in the coop while the rest eat in their pen. Here is what I have had success with:
Plain, whole milk yogurt mixed with some half and half to make it creamier,
small curd cottage cheese mixed with half and half,
homemade creamed corn (canned has added sugar and salt), which is corn kernals run through the blender with added half and half or yogurt or cottage cheese
runny cooked plain oatmeal, again mixed with half and half
I have also blended any combination of the above with anything that adds nutrition: turnip greens, spinach, wheat germ, peas, green beans, anything chickens can eat. It just has to be a loose, wet mixture that she can scoop and lick. I don't recommend adding regular cheese - it becomes gluey in the mixtures and she can't eat it.
Sandy also eats regular crumbles - the finest I can get - in a standard metal hanging feeder that is always kept full. She is good at digging her beak into the feed and scooping it out. This causes quite a mess, but the other hens peck some of it up. Sandy also goes out in the yard to forage with the rest of the flock - she can't peck up a worm to save her life, but she scoops up soil. Maybe she's getting nutrients from the soil microbes. She always comes back to the coop with a full crop, happily. I do trim her beak once in a while, with my dog's bypass-style nail clippers. I once cut too close and would up having to hold her until the bleeding stopped, so I'm extra careful now.
Good luck and keep us posted!