#2 "Cheesy" gimmicks like PCO's Frankenstein impersonation.
Perhaps one of the biggest differences between Ring of Honor and promotions like TNA/Impact or WWE is their reliance on more grounded, or 'realistic' wrestling characters.
For example, the Undertaker's gimmick wouldn't have been approved previously in Ring of Honor, because it doesn't fit the mold of dedicated professional athletes plying their craft for pride, glory, and money.
But Ring of Honor hired the fifty year old PCO for their promotion, and he has been using a Frankenstein-esque gimmick and character since his debut.
The fandom seems to be split on how to feel about PCO's gimmick, but there's no doubt that it's making some long time ROH fans feel uncomfortable in the least.
Ring of Honor has avoided this type of sports entertainment chicanery in the past, and changing that now could alienate their loyal fan base.