Having thought about the matter, a huge amount of problems come down to one thing
We are not winning enough collisions in the forwards.
We are not breaking the line attack, we are not securing quick enough ball at the breakdown, we are not forcing them onto the back foot enough in defence. As such, our attack struggles and Will Genia has too much space. If anything we've gone backwards.
There are four very obvious possible changes I see to the pack here
O'Brien for Lydiate - Obvious why
Faletau for Heaslip - A superior player in the tight
Gray for Parling - Not sure I'd want to do this, but Gray is the bigger man. Worth considering.
Cole for Jones - I'll take flak for this, and there's obvious risks attached, but Adam Jones has managed a grand total of 6 tackles in the tests to Cole's 9, despite obviously having more time on the pitch. Jones can't keep up with play to positively influence it outside of the scrums; Cole might.
I would certainly do the first two (Croft on the bench). The others? Not sure, but might be worth it.
I'd also like to see us run more on the fringe like Genia got the Ozzie forwards doing. Any of our scrum-halves should be able to do it, give the forwards a real run-up at an unsettled defence - Jon Davies off lineout ball and Sexton's breaks were probably our most effective running threats, yeah they're the two weediest guys in the team (close enough), but they've been the only two guys with the chance to go for it.
And speaking of Davies, he needs to be shooed off for one of Tuilagi or Roberts. Not bad, but not good enough, and the other two are stronger men. O'Driscoll gets a pass on my desire for smashmouth players due to being O'Driscoll.
And this is where Evans, the most successful lineout jumper on tour, comes into the reckoning imo.
Define most successful? If its most ball taken, that's usually a better sign of "Most Greedy Lineout Caller". Believe Parling still leads lineouts stolen.