We're not blaming it all on the structure and design of the stadium, but when asked what can be done to improve the atmosphere, then longer term, I think such changes definitely would help.
Totally agree with your other points though - new songs/ flags etc. should be welcomed and not cringed at.
The club has got exactly what it deserved - the stadium design has done nothing to create a decent atmosphere, with padded seats, very shallow and small stands behind each goal, massive corporate bias, over sensitive efforts to make it a ‘family day out’. What did they actually expect...