Late info (and post Reff, which saddens me). Initially, it is going to look bad. The trail, and even sections of the throws area, will supposedly be sacrificed as the construction staging ground for the facility (it has to be somewhere). The throws area and trail (if there ever will be trail between the facility and throws area again) will not exist in any "traditional" function (by this I mean the loop I've turned laps in a Pontiac Grand Am in - good times). Like it or not, it is going to be different.
Most won't care, but there are some scary good times that have been turned on the outer loops of those trails. One loop, two ... multiple loops (I know folks who have run some truly long runs in there). It is a small part of WF athletic lore, acknowledged. But some Deacon harrier greats have pounded rockdust on those trails. While I know the trails will survive the construction of the facility, they will be different. On to the next era, I guess.