May I inquire as to how long you guys have been playing crane? I have slight suspicion
that the "comfortabilty" of Crane vs Haydn is mainly due to familiarity.
My answer to this is the same as Rüdiger's above.
I might, however, add that before I took up the Crane (just over 4 years ago) I had been playing the German and then the Anglo for more like 4 decades. So I was familiar and "comfortable" with the Anglo. I wanted a duet so that I could play sophisticated arrangements in a variety of keys - the more sophisticated my Anglo arrangements got, the more I was tied to the key of C.
So I studied the various duet layouts, but unlike you, I didn't attempt to apply "objective" criteria. I looked for the layout that seemed like it would be the most "comfortable" for me.
For ME, not just for anybody. And for me as a banjoist and mandolinist of long standing who is familiar with key signatures, the Crane seemed, on paper, to be The One. So I bought a Crane, and after a few days learning chord shapes and scales, I was making my own arrangements of familiar tunes.
The fact that I'd been playing the Anglo for so long didn't put me off, or make the Crane seem "uncomfortable." I was just too pleased at having the added capabilities. Perhaps the fact that my Anglo is a hybrid and the Crane is a traditional-reeded Lachenal played a part - the Crane just sounded better, had more "presence."
The problem with your "objective" criteria, as Rüdiger also points out, is that all the systems score about the same number of points, though for different reasons, so in the final analysis it all comes down to what is comfortable for YOU.
You may be able to assess this on paper, as I did (looking at button layouts, playing "air concertinas" of various systems, trying to get your brain round the spatial-musical relationship), or you may try out different systems hands-on - not just for 10 minutes in a shop or at a session, but for long enough to be able to play something on them, with the handastraps adjusted to your hands, etc. You've tried the Crane and can't make sense of it. Now you've tried the Hayden, and seem "comfortable" with it - so why worry?
BTW, if you're serious about selling your Wheatstone 55-key Crane, PM me with a couple of pics and a ball-park price ... (seriously!)