I feel adding this would probably make the game feel a little more gamey/arcadey since everyone would be expecting MOTF and pretty much forced to fight in certain locations. Anyway this last bit I'm just trying to say I don't dislike how battle is now, I like the freedom of being able to use different tactics and parts of the map but sometimes those different tactics or parts of the map don't make for the most exciting gameplay for everyone. I think that's what I wanted to add to this.
Another idea: Maybe after a certain amount of time on the server. It will start to count the time between kills. If a kill is not made within 30-60 seconds, a MOTF will appear.
That way the game does not force people to fight in a certain area. It will just force people to come out of hiding instead if the action dies out.
I do agree, we do not want the game to be too "Arcade-like".