According to a tweet posted by WrestleVotes today, Triple H ("& others") are said to be "severely underwhelmed" by a "handful" of certain acts rehired by WWE since Vince McMahon resigned in disgrace over the summer. These talents - none of whom were specified - have "underperformed".
Comprising the apparent 'Infinity Gauntlet' of returning names are:
Karrion Kross and Scarlett Bordeaux; Hit Row (minus Swerve Strickland); Dexter Lumis; Johnny Gargano; Candice LeRae; Mia Yim; Bray Wyatt; Tegan Nox; Braun Strowman; Dakota Kai; Zelina Vega; Emma; Karl Anderson and Luke Gallows.
Acts like Solo Sikoa, Legado del Fantasma and IYO SKY are presumably exempt from consideration, since they never technically were brought back in the "rehiring wave"; they were never not under contract and were promoted from developmental in the usual order of business.
It would be bad form to speculate on which acts have specifically disappointed WWE management, but it would be charitable in the extreme to find zero truth in the report. It's not as if every last talent has impressed to a significant degree - or in some cases any degree whatsoever - upon returning to the fold.
How WWE navigates this in the medium-term might prove tricky. The optics of Triple H abandoning several of these pushes is hardly ideal, since that would very much be a Vince McMahon thing to do - and Triple H, if he is to maintain his momentum, cannot be seen to be repeating the same mistakes with which the promotion alienated many fans.
Perhaps it's time for Triple H to enact the fabled six month plan of meticulous plotting a new character's run on the main roster.