This seems to be the common theme on the game. Some people watch a stream or look at some photos and speculate based on what they see that the game is simpler than it really is.

Others have touched on the multiball points but haven't mentioned the division of the playfield into two smaller areas, both of which play into why TNA is the amazing game it is despite appearances. The lower main playfield area is so tiny, it completely throws your reaction times off and combined with the right side pop, your ball control is really out the window. It's not really as simple as sitting there backhanding the lock shot over and over.

The play mechanics may seem simple but when you stand in front of it, you realize how well it's all balanced out in the software. If multiball were any more difficult it would make the game less fun.