Just about there in respect of the night stopping....security always an issue which is being discussed. The road barriers are being the first to be replaced and the current operation of the barriers shall be replaced by automated barriers operated from the control tower.
Will they fly?....Lets just say more optimistic now than ever before - the opening hours and schedule proposed are getting closer however cannot really say too much more.
The 111 Sqn Tornados were as you are aware a problem and did cause major disruption however in most cases the regulations are that the barriers and road crossing stays closed when the tornados are actually flying around the vicinity of the rock. At least for scheduled civilian ops they are closed for landing/departures etc but opened as soon as practicable after.
You are correct in indicating that there are discussions in respect of a new road...however this is in early stages of discussion and will be no doubt fraught with problems. A tunnel has also been mentioned but the implications etc of this is not even worthy of talk on a sunday afternoon!