Yes EMAS beds would be much better, but hideously expensive. Trouble is they still can't be part of the proper RESA, they're just an additional safety measure.
MOD looked at that some time ago, but decided extortionate cost overruled enhanced safety in that instance.
They should put EMAS in and shorten the declared distances (LDA in particular) to get sensible RESAs and reduce the obstacle issues, but that will inevitably reduce the size/weight of business aircraft that can get in, at least only those with exceptional field performance, specifically landing performance.
The day may come when it's only turboprops and the lightest of jets able to get in.
I see there's a lot of banter still about the use by the likes of Flybe instead of business aviation to save London from a third LHR runway and those slots be reserved for regional connectivity to/from London. Thing is, they would only be able to use old Dash-8s or even Dash-7s. It would be a bit like Plymouth operations of old.