i have had hives like that recover and boom. the key is the brood and brood pattern. is she laying the max that the number of bees in the hive can cover and care for? if she is, i'd wait and see.
rather than take a frame of brood, you can shake in some workers to help boost them.
any of the things you want to do will work, but sometimes haste ruins what could be a good hive/queen and it is early in the year....