It seems to me the more Chiefs fall away and lose players because Rowe isn't a bottomless pit of money, the more Gob Baxter whinges and find fault with the game. Could be the BBC see him as the voice of English rugby, but he's becoming boorish and perhaps desperate to keep his profile in the spotlight.
The implications for his comments on red cards are just what the game can't afford i.e. player gets sent off so you bring on a replacement - is it a like for like (back for back, forward for forward)? To do so means you need a full reserve team available for match day, given you have replacements that are assigned to be used tactically or that could get sent off themselves. That reserve team will have to be fully fit players with no suspensions, international call ups etc, so what kind of registered squad will you need - 70 odd players? How can you do that under the salary cap and where will these players come from.
Appreciate his point regarding a spectacle for the fans, but it could dilute the emphasis on player welfare, whilst at its cynical extreme, there's also the potential for exploitation should a a player like Markus Smith be taking a side apart in a big game - taking him out with a deliberate high tackle (or Chiefs style reckless diving in at a ruck) could level the game in favour of the offending side.
The real problem is that with TMO's you shouldn't end up with red cards being rescinded because they are there to make sure things are right first time around.