Covid may affect prior reservation patterns. If Aulani opens by then you could have the carry-over effect of members using many points banked in 2020. Of course, at the other extreme, if Hawaii does not lift, by April 2021, the two-week quarantine period for those coming to visit, it will obviously be pointless to go.
In a normal year, Aulani has generally been fairly easy to get at 7 months out in April unless seeking standard view rooms or a hotel room (both of which have 7-month issues year round). Even times during the two Easter weeks have typically had at least ocean view open, and usually also poolside/garden view; island/garden view has been more 50/50 during the Easter weeks.