As I said there are several stadia in a more east-west orientation. Wembley and Old Trafford to name just 2. The range of KO times nowadays and prospect of new technologies, such as transluscent panels, closing roof or whatever, make it all less onerous.... further proven by the fact the larger format was east-west.
Conversations yes, but following the CWG bid failure (which incidentally wasn't originally for the next games but the following ones), and despite the consultation where 60k was the favoured capacity, the 60k option was dropped. A former colleague of my did structural assessments for both options and the smaller one became the focus after the failed bid...