I do think more promotion is needed, as others have said, just to normalise it. Like all advertising campaigns, this would need several 'styles' of promotion in order to appeal to as many people as possible.
Sadly, I think to totally normalise bf the advertising budgets of the big formula companies would be needed. I honestly have nothing against formula, but some of those ads are very very good at appealing to the perceived 'negatives' of bf, eg. the dad is up in the night boiling the kettle to do the night feed!
I also think more information is needed, rather than just pushing the benefits, and applying pressure to pregnant mums.
With my 3rd child I had a very traumatic labour and my milk took 6 days to come in....6 days of hourly feeding, baby sucking and sucking and not getting very much. Fortunately for me I was experienced, having bf my first 2 children for over a year each. However, had i been a firs-time mum I could easily have thought 'oh no, I haven't got enough milk'.