34 and 27 are definitely considered separate, LAHSO is just normal operations term, if something crashed on the intersection I'd say the hold short line would be way to close for comfort for the EMTs working there, and it's not designed for a persistent blockage of the crossing point. If you really want to get pedantic about the separation you could claim 16/34 operational length to be 2500 only using the portion south of the intersection. If your Jet cant stop in that distance you have other problems, go to Avalon. If you want to know how these laws are written with small risks unaccounted for then look no further than LAHSO, which had no provision for a double go-around with the runway occupied....
I've flown into Melbourne where the Airport has closed for several reasons, lighting failures, tower evacuations, animals running around the runways, VP/VIP arrivals, with no advanced warning, and whats worse the controllers had no idea what to do apart from hold everything in situ and wait for pilots to decide to divert... Do not assume they have solid contingencies for anything other than the staple aviation things... Never go there with minimum holding...