We all went into this month more or less expecting these mewtwo would amount to nothing but psychic attackers and candy grind for out good mewtwo after Shadow ball was removed. I'm only keeping maybe 4 or so of the best ones I got, the rest hit the grinder, their 3 candy trade is more useful than them.
I'm expecting niantic to release a Psystrike raid day sometime in the future and out current non shadow ball ones to be rendered obsolete by comparison, given what they did with Zapdos and (to a small extent) Moltres.