I do come into the category of people who believe that abortion is somewhat wrong (though I don't think it should be avoided at all possible costs and I don't particularly think it should be illegal) and I very much do agree with your four suggestions. Properly available contraception and research into better contraception, definitely good. Less rape, definitely good. Research into pre-natal diseases and pregnancy complications, definitely good. I agree with you that practical support for parents, and removing social disapproval of non-standard parents, would also help to reduce abortions as well as being generally a good thing.

Regarding abortion of potentially disabled foetuses, I broadly agree with you but I think I would want to go further than that in terms of generally valuing disabled people properly. Not just support for parents to care for their disabled offspring, though that is important, but also things like applying universal accessibility principles, changing attitudes as well as social reality so that having a less than physically perfect body isn't (in this context quite literally) a fate worse than death. Even in utopia there would still need to be some abortions, including Savita's situation where the foetus was clearly non-viable, or where their expected condition would lead to unbearable suffering even in a disabled-friendly society. But it would be an awful lot less common than it currently is.