Whoever is working on the stadium work to a brief. That brief will have been outlined by a group at Everton including Elstone. Through the process suggestions will be made by external parties as part of design, and as Elstone has chaired many of the meetings, he is regarded as a major player for the stadium. Probably has a bigger part in this than many at Everton.
The capacity will be a trade off against the top number we can target and the number that can be created.
If the site itself genuinely restricts us to 55k or whatever, then expansion can't be built in.