It may not, but it won't be for the reasons you've stated apart from unnecessary & unwarranted GMP objections.
Very little would have to change re access, segregation,security, logistics,transport or H&S.
In fact by making the change, away fans using the Metro could alight at the Asda stop which would reduce the number who 'piss about' around CB stand and in future potentially the fan zone.
Additionally City fans have Arsenal, Wolves,Villa & Spurs etc fans above us without issues.
Finally all away fans would be 'pitch side' which the PL/Sky have been trying to encourage.
Where is your season card ?