I don't think there is much flexibility and freedom in Russian. There is a lot of conventionality in forming words and sentences. You can't form sometimes something because you just can't Like you say 'Мы победим' but you can't say the same in singular 'Я победю/побежду'. Why? I have no clue.
In English there is just few addings like 'ed, ing', and apart some exceptions, there is not much hesitation to put them.
Adverbial phrases are one of the interesting topics in Russian. Is this a linguistic point? This is a major difference from English, yes?

Can't say 'Я победю/побежду' (??), but perhaps can say ' Это победно мне!' This phrase might not be ok in Russian, I don't know. But the idea of using adverbial phrases is common in Russian, adds a lot of flexibility to ways of saying things.