In BPMN diagrams, you can model boundary events on tasks, which, in addition to the implicit relations, means that a) the event is automatically placed at the closest predefined point on the symbol and b) remains attached to that point when the task is moved.
If a user wants to model implicit relations in non-BPMN diagrams, they have to place all symbols manually, as there are no predefined points to which symbols can be attached. Trying to place symbols on or near the edge of the symbol below can be very difficult when using Smart Modeling and other modeling aids.In addition, if the symbol is not completely placed within the other symbol, ARIS will not move the "manually attached" symbol when the symbol below is moved.
To expand the possibilities for designing conventions and increase usability, it would be nice if administrators were able to predefine points to which symbols are attached when creating implicit relations (e.g. in the template or already when designing in the symbol editor). It would also be nice if symbols that are not 100 percent placed on another symbol to be moved with them.