At 1st glance i thought that was a dumb and scary quote, but there is 1 major mechanic that is admittedly casual friendly: the lock on button. Its in every prime game.and in all honesty i prefer it to twin stick for this particular series. So if thats what hes talking about, my fears are quelled.
As written here, Tanabe's quote reads to me as saying that the Prime games that have alrady been released "look core, but are also beginner friendly."
Which would put them together with, what, half of Nintendo's games?