The 3 obvious positions with less depth are full back, fly half, prop (maybe still hooker if RB doesn't make it back?) Everywhere else, we have numbers.
Yes I would hope that is where they are concentrating, Horwill still concerns me with age and increasing time out for injury, but maybe he was just unlucky this season.
I'd like another lock but it isn't an imperative and Lewies certainly seems like the baby eating variety at 6'7" and 18 stone!