We'd need a new transport plan for any increase, as we have had to do for the current work on Anfield.
How exactly do you think it's not relevant though? I mean the back of the current Anny to the back of what would of been the new stadium is less than 100m, so it's in exactly the same area. Not much has changed in the last 5 years with regards to local transport infrastructure, and I doubt much has changed with how fans travel to and from games.
Presumably there is still that car park?
As for ticket prices in standing areas, I'd expect them to be lower than seated prices, but maybe not as low as half.
So say Ł25 rather than Ł40. (For sake of argument)
10,000 seats at Ł40 would get you Ł400,000.
18,000 standing places at Ł25 would get Ł450,000.
And you'd also make more from selling more drinks, pies, programmes, and stuff from the club shop.
Assuming the average fan spends a fiver inside the ground, that's another 40k in match-day income right there, and given the generous mark-up on all that stuff, at least 30k of that would be sheer profit.
That's Ł80,000 more per match. Not to be sniffed at.
So yes, in principle the club could charge considerably less for standing places and still benefit from the change.