Does iOS micro mscorlib support Func<T> and Action<T> delegates? This would be very important to know for a possible different implementation of HOTween.
I already checked the manual and the basic delegate functions seem to be supported on all stripping levels but Func<T> and Action<T> are not explicitly mentioned.
Unfortunately I don’t have a Mac nor an Iphone Pro license so I would be grateful if someone could tell me 
Found the location of the micro mscorlib:
Unity\Editor\Data\Mono\lib\mono\micro\mscorlib.dll
Action<T> is in that library but Func<T> is not (its in System.Core). A quick fix for that is to define the generic Func delegate yourself:
public delegate T Func<T>();
The only issue left is that Mono might have troubles building the full AOT for some generic classes (see Limitation: Generic Interface Instantiation). Maybe its even possible to test build your with --aot=full without Unity if you have the code in a separate dll but I didn’t get this to work yet.
For more info about iOS limiations see monotouch limitations
Why isn’t important stuff like that documented in the manual?