The capacity of the stadium matters. Every single club who we want to be competing with in this league are building, or aiming to build, a stadium in the excess of 60,000. It won’t be ace if it is below that, it will be a clear indication that the board don’t think we belong in that bracket.
It will be ace even if it is 50k, the location sees to that and the fact we get facilities that start to match what other grounds have had for 25 years or more. Your second point I agree and will explain further below.
Its like saying every other team in the league doesnt aspire to be as "good" as United, simply cos Old Trafford dwarves every stadium in the country.
That's missing the point. There can be a happy medium with what you build to meet current and future demand. If we did build a 50k stadium out of the teams that have moved to new premises we would have had the smallest increase in capacity between old and new. Is that worthy of Everton? Or live up to our motto? It doesn't even touch the fact that we had one of the largest stadiums in the country up to a few decades ago. If they give existing season ticket holders the opportunity to buy extra tickets and with the extra premium/hospitality seats it could be possible that there may be only a few thousand extra available seats over what we have at Goodison. It would smack of a lack of ambition and freeze fans that want to go to the match but can't now and will still struggle once we move. It also gives the club the excuse to put up prices when demand is greater than what can be supplied. As i have always said if we can only afford a 50/55k stadium then that will have to do. There should be no other reason like will we fill it (as long as it is sensible <65k) as all metrics point that we can, at least for the most part.
If we get a (considerably) smaller stadium than spurs/arsenal/liverpool/city and on a par with Newcastle and who knows a Wolves/Villa in the future then it is just another reason for people to put us out of the bracket of the top clubs. If you look at any of larger stadiums on Wikipedia it will say x biggest in the country, like it or not it is a source of pride and stature.
There is constant disagreements on this thread to what we could fill, due to conditioning of fans minds what we are/were as a football club. Perfect for our board to have an easy way out.
Personally I think it will be 55k minimum which is acceptable to most, but 58-60k is where it is at.