le tirer, i agree with all of the points you made, it is frustrating (from atc point of view) to turn aircraft away and more capacity would be great but was just stating the current reasons for limiting diversions(as i understand them).
sure there's room to park aircraft but no capacity to efficiently disembark/handle many extra inbound flights. as for the exec jets, for an authoritative answer someone from signature needs to respond,while i was there last week signature handled several extra jets and worked their socks off.i guess they reached their limit and had to turn some away.