I doubt they would have soured on Strome after he went back and had a fantastic year developmentally, and is now living and training in the valley in preparation for trying to make the team. It's true that Strome is a bit of a stepchild to Tippett, he wanted that pick traded for Dougie Hamilton. But after not putting in the work in previous summers, he put in some major work and continues to do so. He's a tremendously valuable prospect, as is Keller. Domi is probably the face of the franchise. There'd be no bigger 1-2 dick punch than pushing Doan out and then trading Domi. Dvorak is Tippett's favorite youngster out of the lot. I don't think any of them are reasonable targets.
I know Stepan would "hurt", that's why we're talking about 7 overall as a starting point, plus lots of useful other things, including good young players. Good players get traded for top 10 picks. This draft lacks high end generational talent but the top 10 is as strong as ever. I also really don't see someone like Crouse as off limits, if you want him. But the trade has to be good for both teams and align with their goals. I see Rangers fans fabricating reasons (some completely absurd) as to why an unreasonable ask will be palatable for a GM that doesn't really make a habit of overpaying for anything. I think your position is that Stepan won't be moved under any circumstances unless it's an extreme overpay, and I don't agree.
What is the situation at RD if Klein retires?
I think you make very well written posts. But you miss the point here. Derek Stepan is just 4-5 years older than Max Domi, and there are no guarantee that the later ever will become as good or achieve as much as Stepan has. Although I hands down would take a 22 y/o Domi over a 22 y/o Stepan, its not guaranteed that would be a good choice and the prediction must be that they will call it quits with perfectly comparable careers.
Max Domi is of course off the table for Stepan, like you say. But put together a package you would accept for Max Domi, then maybe adjust it slightly and you will come closer to what it takes to get a perfectly serviceable No 1 center or great 2nd line center that is 27 y/o.
Would you take the 3rd overall pick and a good young player or two for Max Domi? Of course not.