What I'm getting from your argument is still that overpowered, to use your words "extreme", tactics available to players don't need to be errated out because the dm is fully capable of being heavyhanded and punitive, to use your words "extreme", to counter their actions. If this style of game balancing works for you and your group, then by all means, feel free to continue to do so. However, in my group, such actions by the player, and then counter actions by the dm, would only lead to tension and hurt feelings. I would prefer to resolve the issue by balancing the ability to be more in line with other options available to players. I simply disagree with your style of dming/playing. Wouldn't it be possible to errata this issue for people like me, and your group can continue using the old rules? Or you could houserule new, extreme versions of abilities the dm will then have to ratchet up his adventures to counter? Frankly, it feels like a vicious arms race I'd rather avoid with my group.
That is not my preferred style of gaming. I do have friends that like that style of gaming and I participate in their more power gaming style games as they participate in my more storytelling style games. Both are legitimate. Because in your group this would cause tensions and hurt feelings you feel it needs to be changed for everyone. Apparently you do have players that would fully abuse this and then get butt hurt if the GM responds within the rules accordingly. Because of this you feel the game needs to be errataed to cater to your group's issues though 99% of the players won't have an issue.
Also you keep using the words heavy handed and punitive which are subjective terms which you have no right to define for others. Some would not find using the setbacks as I have suggested either heavy handed or punitive. Also what is heavy handed or punitive would depend on the game. What is heavy handed in one style of game would not be in another.