I agree, vilas, and we were taught exactly that as part of our Jet LOFT ; (737 sim), at the end of our ATPL course. As someone else said, when you trim, you trim the THS, not the elevators, hence you have to return the elevators to neutral in-line, as you trim, by returning the yoke to neutral.
I personally don't like that design from an operational point of view, and can fully see why Airbus in their wisdom designed it out
