I'd expect the bar to be set a little higher than Jack Gordon or Mike Keenan.
Vaive & Derlago were pretty bad in the long-term (Defcon 1 bad) but at least it gave us but a brief glimpse of the holy grail (yeah Brodeur carried the team; but Williams had a large role as well). Considering the prior history of the franchise, we needed any crumbs we could get...
And here's the thing with those GM's that did those HUGE blunders...
Milford (who made that Williams trade) got us Thomas Gradin at the cost of only a 2nd round pick. Gradin was that good.
Keenan (no need to repeat all the crap under his regime) got us Todd Bertuzzi.
Until Benning does something that big on the 'plus side of the ledger' - his mistakes will always be magnified.