I think a big difference vs the UK is that the proposed wording (Head 4) is that the risk must be one of serious harm to the health of the pregnant woman - whereas the UK just has 'risk, greater than if the pregnancy were terminated, of injury to the physical or mental health of the pregnant woman'. Risk of serious harm is a much greater hurdle than 'more risk than if the pregnancy were terminated'.I am looking at how similar this is to the legislation in England and Wales and assuming we'll end up in the same place.
I think what is being proposed is far from ideal but it is better than what we have now.
Another reason we can be expected to end up with lower abortion rates than the UK is attitudes generally to abortion. Ireland IS different. The 30/35/40% no-vote demographic will never consider abortion. The 'totally against abortion in all circumstances' percentage in the UK seems to be sub-10%. So just as a starting point, our rates should always be at least a third lower.
Stricter legislation (above) and further differences in attitudes to abortion (the yes voters who wouldn't have abortions themselves but don't feel they should impose their views on others in difficult circumstances) will make these rates lower again. Probably all the way down to where they are today (possibly lower) - but with Irish women cared for in Ireland rather than exported as a problem.