Went out the window when they selected this squad?
I share your concern but out of the guys realistically in contention... Haskell? Wood and Clark certainly aren't major ball carriers. Itoje maybe? Burgess probably isn't ready, Ewers isn't there...
I'd like to take this opportunity to start the Mako for One platform, because we won't be selecting ball carriers anywhere else!
I agree the ball carriers is a major deficiency and has been for some time, but I wouldn't drop Marler, his scrummaging and defence has been crucial to England over the last year. I'd try adn build ball carriers into the rest of the pack somehow - firstly, drop Hartley whose throwing has deteriorated and who has never been international class at anything else for Youngs, who seems to throw perfectly well at Leicester from what I've seen and is much much better than Hartley at pretty much everything else. And far less likely to get himself sinbinned in the 70th minute of a tight World Cup semi-final.
Second row, Attwood on his best form would challenge Lawes - and offers probably slightly more carrying I'd say, compared to Lawes' vicious tackling and aggression around the park. But he hasn't been on his best form, so Lawes-Launch seems nailed on - neither big physical carriers, although Launch has that wider-channels athletic carrying and hands going for him.
Back row, Burgess is almost certainly not ready ... he's also not a massive ball carrier in the smashing-defenders-off-the-park sense, for Bath he's been making large numbers of carries but he hasn't made memorable, barnstorming runs where he smashes through three defenders and makes 10-15 metres really. Doesn't matter, both types are important, just an observation really. Anyway, he isn't ready. For me Vunipola's improvement in the non-carrying areas of his game (defence, workrate, breakdown work) since Morgan's injury mean even with Morgan at (hypothetical) full fitness he's my nailed-on eight. Been really impressed with him this year, England's most improved I'd say. Robshaw is captain and a superb player in what he does so nailed-on. But we need another carrier in that back row - Ewers is everyone's favourite option, with good reason, but not in the squad. Haskell hasn't carried well for England except for one game (against Wales). Itoje? Can jump as well which I like, although not a massive carrier, maybe with Youngs in there he doesn't need to be. Kvesic jumps for Glaws doesn't he? WIll never happen, but the old Robshaw at 6 and Kvesic at 7 combo is probably my favourite if we're ignoring what Lancaster will and won't consider.
To summarise, if picked tomorrow my WC 1st choice pack would be:
Marler - Youngs - Cole
Launchbury - Lawes
Itoje - Vunipola - Robshaw (or Robshaw - Vunipola - Kvesic)