Looks like the wotc co board, is having quite the b-!@$# fest about these cards.
The use seems to me:
(1) ... the smallest deck, to cycle through to the "good" card you want, as many times as possible.
(2) ... whatever is generally favorable, and otherwise stick with previous schtick build goals
(2a) ... Stun-locker that does cartwheels, weee-weeee
Requiring first a massive dumpster dive through all the cards.
Then in non-T.O. or LFR play, you're stuck with having to have the actual card(s).