Personally I have always felt that losing as defender because of a ramp is basically cheating. If the game had a ladder prop that could be built with buildpoints (eg 50 buildpoints for another way to get into a fort) and placed at certain points on the wall designated by the map maker then I would be fine with it. However, I have always found that the ability to build a ramp anywhere renders large sections of certain maps irrelevant which is a problem (eg ramp at front left of desert fort making the front gate irrelevant as you are already on the wall). I honestly believe that with the removal of ramps and some simple edits to add in several ladders and other minor changes we can have balanced maps that are both rewarding to attack and defend as well as directing play to areas of some maps that rarely see play (eg desert fort again, right side for attackers where the mortar is is unused by both teams unless the front right ladder is down which it rarely is. A ladder on the right side there would promote this as an area of play and would allow attacks to potentially come in from all 4 sides (front gate, left gate, back tunnel, right side ladder)).