I also see here that with that Bravo intersection departure they can depart guys past the intersection of 25L, therfore not needing to worry about the arrivals on 25R.
Not sure that I follow you here. 25L/7R doesn't intersect 1L or 1R. If you're meaning 25R, I agree. However, full length is available on request, and that would mean some issues, as they'd have to cross 25R to get to it, plus make sure there's a hole in the 25R arrival stream so they can get the 1R full length departure off. I'm going to have a listen to it all day today, to see how they'll handle VIR43/VIR44, as they are the nonstops to EGKK. I'd listen also for PIA103, but since it stops at CYVR before going on to RPLL, it won't have much to fly before refueling at an airport with a longer available runway.
When departing 25R, VIR44 generally gets fully rotated by the time it passes 25R at Delta, and that's at least a good 9000 - 10000ft down the runway. So they could depart 1R easily at full length, but now having 1550ft less to use will make their departure interesting, let alone their routing to Gatwick.
BL.