Improve flexibility for action conditions

"Type of Calculation" AND, AND/OR and OR are great for many cases but make things complicated for others.

For instance, I'd like to set up an action and exclude two host groups. Type of calculation is set to AND.

(A) and (B) and (C and D).

A – Trigger value = "PROBLEM"
B – Maintenance status not in "maintenance"
C – Host group <> "I_do_not_want_you"
D – Host group <> "You_neither"

Fine so far!

Let's extend this example:

E – Trigger description like "Please help"
F – Trigger description like "Very urgent"

I'd like to see something like (A) and (B) and (C and D) and (E or F).

But that's not possible, given the constraint of either AND, AND/OR or OR. I know I could create some auxiliary host groups, but I think that's not the way to solve this in the long term.

Could this be improved to be more flexible?