(where many of the accidents were that brought all of this on)
many? - One (2RN), I think, in about 35 years of GAAP and umpteen million movements.
being channelled to the same point remain inherently dangerous.
possibly - but I would suggest not nearly as dangerous as coming inbound between two IRPs and directly into the teeth of multiple OUTBOUND aircraft. A major part of having IRPs is to segregate inbound from outbound.