It would help immensely if much better quality info was available to women, enabling actual choices, backed up by funding for that.
So... pros and cons of all kinds of birth so you know eg your risk of tearing by age, of having a 'standard vaginal birth' or having an assisted delivery or EMCS rather than the current obsession with making women go to the birth centre if they're low risk. Lay out all the pros and cons and let them choose, whether that's an ELCS because they want to avoid tears, or a home birth. Obviously that would need funding!
Much better info of risks and benefits of EBF, EFFing and combi-feeding, instead of lots of blather about EBFing and no support for anything else. What is a good choice for one woman won't be for another, and sometimes there isn't a choice (eg if you have milk delay/low supply like I did). This would also stop women having to turn to the formula companies for advice. Restrictions on marketing already exist for formula, but they should be applied to BFing too so that over-hyped subjective claims aren't made and you can see the actual figures for supposed benefits. Provide support for infant feeding to all, no matter the feeding method, to stop stigmatising parents.
Like the idea upthread - have children's centres that are open to drop into as a welcoming inclusive place where you can go if you're struggling, lonely, suicidal, a bit sad, need to get out of the rain, fed up with being at home with a baby or just fancy a change of scene. Whether a mum, dad or carer. Somewhere you can get a cup of tea, put your baby down safely and not be judged. Again, lots of funding needed! We're really talking about the baby year here but also for the energetic toddlers - somewhere safe to run off steam, play without being glared at etc. but separate from the babies otherwise they'd run them over 
It would also help to have crèche type facilities cheaply and easily available - I really struggled to cover things like dental appointments when mine was a baby (once I went back to work I went in work time whilst she was at nursery), let alone more frivolous stuff like a haircut! DH could do it, but had to take a half day's leave just to cover my 10 minute appt! Having somewhere like that to leave my baby for a couple of hours so I could have a break would have made a huge difference to my mental health on maternity leave.
But, again, funding. Although I do wonder how much our four days in SCBU caused by EBFing and then treating my severe PND cost...