Kindred being the Stacy Twins is a really underwhelming reveal as being two people from a hated storyline everyone wanted to forget was beyond dumb. Further, he was clearly set up to be Harry:
Having Sarah/Kindred and Gabriel/Kindred working directly for Mephisto as his champions despite the previous issue suggesting they're possessed by Harry, either via his soul in Hell or the Harry AI. Rereading all the times Kindred interacted with Peter, Norman, and especially MJ only makes any logical sense if Harry is the one puppeteering the Kindreds. There's also the scene in which Kindred reminisces about Harry's death in Spectacular Spider-Man #200, which is told from his POV as if he's Harry
All the hints made it clear it was Harry. Like with what Norman said to him during Absolute Carnage, the way he spoke about Peter and Norman indicated a very personal and history that only Harry had as well as the dialogue about paying for your sins. Issue 73 made it clear it was Harry using Sarah/Gabriel as vessels or something not that it was actually them. This whole thing was a confusing mess which ruined Kindred and made everything about it pointless.
The end result was so lame, after a build up of 3 years, its two people from a story everyone wanted to forget and have like zero personal connection