Congratulations on a wonderful product.
As an experienced VB.Net developer I miss a few features:
Option Explicit 'requires all variables to be declared.
Since debugging is rather primitive in Android, a misspelled variable name can mess you up. B4A just creates a new variable with the misspelled name. Requiring variables to be dimensioned would help.
Automatic matching of variable case. In VB.Net all instances of a variable are matched automatically to the same capitalization as the original declaration. An excellent feature I miss a lot.
Reusable classes. I miss custom controls and classes. They make coding large projects a lot faster and cleaner. I realize this is not too likely but I can dream.
Anyway, keep up the great work.