The other primary analog year is 1955, actually the analog distance is shorter, but the delta latitude component is smaller. That is delta of -5.2 for 1977 vs a + 5.8 delta for 1955.
The colder latitude model would certainly produce more storms. It is just that the latitude is such a critical component that I think it should carry more weight. Double 12 and you got 24 add 4 to that and you got 28 with 5 U.S. landfalls and 10 major storms.

A positive QBO is an indicator of a stronger tropical season. 2005 is an anomaly a smaller delta with a greater storm count.
This might be indicative of a optimal moon latitude for storms. The el Nino is directly related to the latitude of the new moon at aphelion. That could be a solid hypothesis.
If I handicap 1977 with 3 more prorated storms plus 4 that would be 13 storms total still below average.
2005 was the end of four warm years at N0, W180 2011.