Don't be alarmed--in general, women DO NOT dance ballroom in 4 inch heels! Perhaps a rare Latin competitor might, but 3 inches is more typical and 2.5 is fine.
Some ballroom shoe manufacturers offer the option of an extra-flexible sole, which would help in pointing the foot. Sorry I can't remember which ones do, but a little internet investigation should find them.
I've danced in an Elegance shoe, but not that model. I do like mine a lot.
Good luck!