I think their "effect on the game" has been horribly blown out of proportion up to this point in the season. It just amazes me that people act like they've never complained about a call in any season before this one, and now suddenly this is the first year ever with any questionable calls. Typically in any game I've ever watched there's at least a couple of questionable calls per game, just now everybody has a central thing to blame it on.
The worst thing about the replacement refs so far imo is that they have made some of the wrong calls, though not noticeably wrong. IE calling illegal contact instead of defensive holding, or defensive holding instead of PI (but like 5 yards down the field) so the outcome of the play would've been practically the same
In the Lions Titans game they spotted the Titans an extra 12 yards in overtime putting them in field goal range.