I can't say for sure if flowering nutes early does anything either way. Plants take up different nutes based on what phase it's in. They use what's available to them. Think a super soil recipe. Everything it will need is in the soil and all you do is water it. The nutes basically sit in the soil till the plant is triggered into needing them.
I won't say it's impossible, just I don't know if it is. If there is a way to make it all happen sooner that actually works, I would love to know, but haven't found one yet.