I'm not keen on these new rules. To somebody who has worked on a car on pit road during a race (although admittedly not a Cup race) this sounds dangerous. How about tracks with small pit areas, like Martinsville? Even if nobody gets hurt, somebody's race will be impacted because another car (being worked on) blocked them and cost them track position... maybe the win... maybe crucial championship points... Plus you only get five minutes? We will see pit lane clogged with cars that would have gone straight to the garage – fixable or not – due to automatic disqualification for going to the garage, and race delays due to resulting pit road problems. And then the whole “what is mechanical damage?” that can be repaired in the garage and then return to the race. I suppose NASCAR will have to quit bragging about how many starters finished the race.
If it’s so spectators can see repairs being made, a camera feeding big screens in the infield / split box on the TV screen would be seen by more spectators than the few spectators at the track who happen to have seats with the right view. That camera feed could provide audio too (that the few spectators who might be able to see can’t hear).
If it's to "save money" LOL you can't save racers money. They will spend it elsewhere. There is too much at stake (sponsorships, TV exposure, championship purse, etc.) for racers to let any opportunity slip by. To anybody griping about R&D: if you don't do it you will be left behind fast, and soon the only way you'll make races is if you own a franchise. Even if NASCAR required cars straight out of dealer showrooms, racers would spend money to make them faster. This is the top level of racing – not Street Stocks at your local track.
I don't follow the "logic" that reusing damaged panels, rather than replacing them, would result in less debris. You're more likely to have pieces come off damaged panels than new panels. Don't like blank replacement panels? It's pretty easy to have replacement panels already wrapped to look just like the panels that get cut off. I suppose you couldn't gain an advantage by replacing an original panel with a new and better aerodynamic panel (that did not have to pass pre-race inspection).
Don't like wrecked cars returning to the race? If they can run the minimum required speed then why not? Most of these drivers are professional enough to get out of the way if they have to, and the black flag can eliminate any drivers who aren't. Earnhardt Sr.'s fans cheered when he returned after flipping his car at Daytona in 1997.
Wrecked cars out there are useless for sponsor exposure? Not true if they get any TV time, even if only by being lapped. A major price justification for sponsorship is calculated by TV exposure time translated to costs of TV advertisements. A wrecked car on the track might not give as much exposure as it did while still competitive, but cars in the garage get almost zero TV exposure.
I won't dwell on possible dirty tricks by team drivers or underfunded teams to damage competitors enough to eliminate them from contention, especially when the Chase segments come into play. But even if occurrences are unintentional, rumors and accusations will fly that will not be good for the sport.
Oh well, new rules are here and they’re everybody’s problem. Hope my pessimism is unfounded.