Not mentioned in this discussion is that the Natl. American rule did not fulfill it's intended purpose of extending the careers of fan favourite veteran American players who were no longer able to secure starting roles, but were still marketable personnel for their team within their communities. A player like Darvin Adams comes to mind.
What happened within one week of the season starting is a few teams of low character figured out how to subvert the rule intent and twist it to their advantage. Both Calgary and BC demonstrated this in week #1, having established starters such Kadeem Carey and Dominique Rhymes listed as backups to no-name players who they replaced after the first snap and played the rest of the game, thus subverting the ratio as the 23 play count applies only to the designated starter.
Same thing was done on defence as teams were permitted to have a designated nationalized American on offence and defence. Game #1 the Stamps used their defensive designation on veteran defensive back Branden Dozier, who started behind rookie Michael Griffin, the Lions subbed vet. Woody Baron in for Global no-name Tibo Debaillie after one snap.
The blame falls on the league for failing to close an obvious loophole on a rule that may have had good intentions and been worthwhile. As the rule change failed to achieve what is was designed to do, it should be altered to more accurately serve it's purpose, or immediately be eliminated.