As has been said, dropping JK would be harsh as he's done all asked of him since returning. He's got to be our best bench option given he can cover plenty of positions to such a high level.
As for Sutty, think we should persevere as there's a really good player in there somewhere - I know it's getting further & further away but that game away at Sts showed what he CAN do.
Resting Ablett sounds like a good option to me as we get nearer and nearer the games that really matter.

Leeds's four most recent defensive efforts have conceded 34, 43, 16 and now 38.

The only acceptable defensive effort in the sequence (and it's no coincidence) coming in an all too rare good overall performance.

We've signed a running HB.

indeed. but we needed a controlling half back

Oh I agree. But I think we need half a new team!

SOH - the contrast between how Cas play and us is telling. I know they're better than everyone else this year, but even last year when they weren't, they were able to set up their left wing for 40 tries. We've got a really good winger on one side and a class centre on the other. Quick, early ball is what they need, and if you actually plan for it its not that hard to do, especially with the supposed quality of players we have inside them.