My mother in law had them in a pot. She would leave them out on the porch until they died down, then she would put the down in the basement until spring with NO watering... She would bring them back out, water them, and place them in their normal spot. She always had beautiful plants.
Your plants are weak because they are not getting enough sun. I agree with you, they look leggy.
Plants the have bulbs and tubers that are planted from SEED can take up to 3 years to flower. After the first year, the bulbs/ tuber are very tiny. They need lots of sun on their green to be able to beef up their tubers and grow them. The larger the tuber/bulb, the livelier the plant! Get these babies out in the sun for a little bit. Dappled sun at first, then slowly increase them to more sun every day.
I wouldn't repot them while they are in active cycle. Wait till they go dormant in the fall. It's plenty ok to leave your pot outside until the green parts die off. They need a dormant cycle.
USDA Zone 7b/ Sunset Zone 31