Formation Constants; Lewis Acidity
I think I got this figured out.

Acidity and basicity are thermodynamic properties. 

Nucleophilicity/electrophilicity are kinetic properties. 

Lewis acids are electrophiles. 

Lewis bases are nucleophiles. 

We can use electrophile/nucleophile in describing Lewis acids/bases. But care should be taken to ensure we don't conflate kinetics with thermodynamics. 

I think I finally got this issue resolved.