What I can't quite get my head around is whether this England team is simply superb or if they're being made to look disproportionately good by the paucity of the opposition. I think it's probably a bit of both, but more of the latter. Maybe they've simply stolen a march in getting their act together the way the ABs did when the men's game went pro.
Moved here, from the England v USA thread where... it's less relevant
England were officially professional before anyone else - though messing about, alternating between XVs and 7s.
England were properly professional in approach before anyone else.
England have the only (?) fully professional league.
TBH, we only that one from 58 due to some horrendous decisions (in 2 matches) gifting the NZ RWC to NZ - the SF against France being particularly egregious.
On their day, all of France, NZ and Canada can beat us.
France have regressed since the last RWC (where they were arguably the best team there), and whilst they're better than anyone other than those 3, they're unlikely to challenge. Always seem happy to be 2nd best in the 6N. They can close down our outside backs, but are vulnerable to our steamrolling maul.
New Zealand are a great unknown - they just don't play enough against decent opposition to properly judge them. WXV should give us a better idea once properly established. Recent results have seen them draw (and lose) against Canada, beat France, but also lose to Ireland and England. They've got their taliswoman back for this, but at 33, and (I think) not having played XVs since the last RWC - they should need more.
Canada are good, with a powerful pack - they're probably best placed to stop England's rolling maul, but I'm not sure they've got the organisation in defence - or the pace out wide, to stop our back-3.
England have the best all-round game, but under Mitchell, we're not the best at bringing our speedsters into the game (though they're so good, they can often make it work anyway). We'd be so much more lethal if we used them a little more - especially if Kildunne could develop her passing game - love her, but she either scores, dies with the ball, or passes the ball as part of a set play, but often poorly, and whilst she may have scared a defender, if passing, she does so without committing them.
Of the rest:
USA (first RWC winners) has really moved backwards since other teams went even semi-pro. It used to be enough for them to simply have a huge population of excellent athletes, and spend a couple of months teaching them the laws of rugby. Not anymore, and they're dropping down the rankings.
Scotland and Wales, and they turned professional just in time for the last RWC, and between that and the PWC starting up, they've come on leaps and bounds - but they're still putting structures in place to actually develop and exploit talent.
Ireland are trying to go it alone with a professional league of their own - the last of the 6N teams to go pro, but they're doing the opposite of Wales & Scotland, starting with the structures, and building from the ground up. They can compete with Wales and Scotland, and on their day, with France and New Zealand, but it's a RWC too early for them to really think about not-losing a semi-final.
Italy - they've a few stars (Rigoni especially) but little depth. If all are fit, there's nothing really in it between Ireland, Italy, Scotland and Wales (but that order is about right).
Australia are also worth a mention in this "also-ran" bit. I've not seen enough of them recently to comment intelligently, but they're ranked between Ireland and Italy. I've only seen them lose to the other teams I've mentioned so far (except USA). If it wasn't for their ranking, I'd put them around USA, South Africa, Japan, Fiji as being there to make up the numbers. TBF, they did beat Wales and Scotland last year - I just missed them.
One thing I will really note about the improvement that professionalism has brought - is the kicking.
3 years ago a kick at the post from dead in front, and 22m out was still only a 60%(ish) chance. A kick to touch from around central in the field (laterally) was unlikely to make any ground at all - pretty much kick straight laterally.
Now you're seeing conversions even from tries in the corner (not as high a %age as the men, obviously), and a kick to touch from central location will make you a good 20m or territory gain with it.
Obviously, kicking is a skill that needs repetition, being professional, with the capacity to just spend a full hour every day doing it has brought incredible gains already, even for kickers who don't have an specialist kicking coach.