For starters, there's no such thing as a tier 1 stadium, this is something you have made up. Your list of requirements is so contradictory it's unreal.
Secondly, have you read the document?? It highlights the issues of waste when stadiums have been built that do not meet the requirements of the "owner", and in reality have become a waste.
Your idea is to build a 60,000 seater stadium to meet the requirements of a tournament that may come to this country twice in a lifetime, yet have no direct affect on the club's it designed for.
The entire issue of a stadium is supply vs demand, like any basic business model. You cannot just build something in the hope that it's filled, how could you even gain financial support from third parties, it's bordering on the impossible.
If you took a very conservative figure of £4000 per seat you're like at approximately £250m build costs, then add on project management fees, land purchase, contingency, infrastructure and egress....you're up to £400m in the blink if an eye.
The Emirates came in at £6500 per seat all in, there season ticket prices and ticket prices are sky high, is that what you want for Everton?? It'd be counter productive, the price needs to remain low to keep existing support as well as attract 50% more people to the ground. You're also in competition with echo arena and convention centre for outside business, but they both have the benefit of being city centre locations which us beneficial for transport.