Rukoo and Qaumah

Q: Seeing that people are hasty in salaah, should one enforce the reading of the Mustahab duaahs between the sajdas & after ruku or should one stick to the hanafi Madhab by reading these duaahs in the nafl salaahs & merely encourage people to be mindful of the Waajibaat etc?

Q: In s​alaah after ruku while standing when one is reading rabana walakal hamd. Is salaah valid if most of rabana walakal hamd was read standing and maybe a little while moving down? If not and one just bent his knees a bit and moved his hands forward, then is it valid?