I wasn't working before I had DS (so had zero maternity leave entitlement). DH took two weeks of annual leave, one week of 'maternity support allowance' (offered by his employer to anyone - so could have been a mum/sister/etc as well as the father - supporting a someone who has just given birth or adopted a child, one week at 100%) and one week of PL, we couldn't afford a second week.
Still, after a good month at home, he was sad to have to go back so soon. It wasn't really about childcare - I was going to be at home after all, it was about him getting to know our new baby and how to take care of him together. With future pregnancies it would also be handy for him to look after DS/other older siblings whilst I'm going through that hard, establishing breastfeeding period.
I don't think current suggestions for how to change parental leave would effect us, because they seem to require the woman to be entitled to mat leave but not claiming it. I don't think women should lose their right to take all of their leave and have to share it with men. I wouldn't like to think that some women would not be able to take the maternity leave they'd like to because of men suddenly valuing family time.
So I think fathers should gain their own entitlement to leave, by extending paternity leave and making it more generous - but not at the expense of mat leave. Though they should be able to take it either concurrently with mat leave or could maximise their childcare cover by taking it when their partner is working. I assume this would be a use it or lose it option, but doesn't penalise women who don't want to give up their mat leave.
I realise this would be the expensive option, because for each child you'd begin to double the mat entitlement, but it could start off slowly by extending paternity leave to a month, with at least 2 weeks full pay. With the idea that over time the number of weeks, and the number of weeks at full pay would increase.
His entitlement to leave would not be dependant on what his partner was entitled to, taking or not taking.
So this is a bit stream of consciousness, I haven't totally thought this through. I do remember seeing a news item talking about how men in a Scandinavian country had a culture of using their parental leave/share of maternity leave to go off on long hunting trips. So I guess the culture is hard to change. But I don't think advances in paternity leave should come at the expense of mat leave.