I doubt whether HMP Alert will be immersed into the main HMP program for simple economic reasons; they use the free Alert only to entice users to buy the main one. And having 2 distinct products will still remain the same with the release of the much more feature-rich version 3 of HMP.Alert.
There was also a suggestion at one time that MBAE would become part of MBAM ( a great idea!) but now I think that for the Professional/Premium versions, Malwarebytes want 2 revenue streams with annual licenses.
In contrast, I much prefer to use a layered defense, but each to his own