Just my opinion - take it for what it's worth (which may be nothing <g>).
If you're buying
dvc wanting to stay primarily at AKV, you'd be nuts to buy anywhere BUT AKV. If you're wanting to buy dvc to rotate staying at all (or most) of the different resorts for different trips, then it probably makes more sense to buy a cheaper SSR resale. The difference in SSR expiring in 2054 vs AKV expiring in 2057 is not a material difference in my opinion. Depending on your age, the difference of AKV/SSR 2057/2054 vs the other dvc expiring in 2042 might or might not be important.
Usually it's not hard to get what you want at 7 months, even if you have to go on the waitlist at first. However, there are exceptions - and if any of these scenarios are really important to you, you might not want to take the risk.
BWV standard view - especially during peak seasons plus Oct, Nov, Dec due to Epcot area events. Same is true of any BWV grand villas.
BCV is tough during Oct, Nov, Dec - as well as peak holidays (Easter, Christmas-New Years)
VWL is tough during peak holidays - it's a tiny resort
HHI is tough during June-July, especially for anything other than a 2br.
Vero beach cottages are tough....and the entire resort books early for Feb-April.
OKW & SSR are easiest to get at 7 months - almost a sure thing.
AKV - we have no experience yet, but concierge rooms and standard/value will likely disappear at 11 months due to a very limited supply to meet the demand.
Hope this helps.