Are you waiting for a single ST? I think this makes a difference.
I was looking at stadium capacity and how many season tickets they have:
Everton 31,500 ST Capacity 39,400 80%
Newcastl 38,000 ST Capacity 52,257 73%
Man City 40,000 ST Capacity 53,400 75%
Arsenal 45,000 ST Capacity 60,704 75%
Man Utd 55,000 ST Capacity 74,000 74%
West H 52,000 ST Capacity 62,500 84%
liVARp 25,000 ST Capacity 61,276 41%
Chelsea 25,000 ST Capacity 40,173 63%
Aston V 33,000 ST Capacity 42,530 79%
So on average i would say 75% is a most common and average figure to use and that would stay well within PL rules which is the reason we dont increase season tickets numbers currently. Ignoring liVARpool, at 40% they obviously hate their loyal fans.
Also a drop from our current 80% at Goodison.
EFC BMD 39,000 ST Capacity 52,888 @75%
So i guess we will increase season tickets by around about 7,500 That would still leave plenty of capacity for hospitality, away allocation and general match day sales to members.
My other guess / prayer is that 7,500 clears all the tier 1 ST waitlist.