There are still 4 french teams left in the Champions Cup. Of course only 2 of them were pool winners, and they have plenty of foreigners, but still plenty of frenchmen in there too.
Leinster are basically an Ireland 15, but you could argue it the other way around. Ireland are basically 1 club team with a few extras (pretty much the same story with Wales and Scotland, and maybe Italy). Whereas England and France are the best players across 10+ clubs.
Jones is hugely exaggerating England’s ‘injury crisis’. Vunipola is a big loss, but a lot of the injuries aren’t starters, and they have 13/14 professional clubs to pick from. Worth seeing Conor O’Shea’s answer when he asked about England’s injury crisis - he names their starting 15 without hesitation.
On Rory Best - His lineout is sometimes a worry indeed, but it is still between him and Cronin, as Treacy (even dodgier lineout throws) and Scannell are injured.