My kids (3 girls 8 and under) get quite a lot of clothing as gifts, and even more as hand me downs, to the extent it overwhelms me at times, but I have been surprised to have just identified some wardrobe holes, namely

nice refined cardis to wear over dress
tracksuit pants, for younger 2
pyjama pants for youngest and
leggings for all

I think I am going to have to go shopping for them, a prospect which scares me a bit.