Does the "safety bungee and the first segment of the front line for replacement" correct the problem or are you saying that this is just a replacement (replica) for the issue once it breaks and becomes a real issue?
It doesn't fix the problem, you just go back to a new line that is not frayed but will start fraying again the moment you start having this union go through the tube. It's a big problem because even if you don't flag often, you should check that your safety works periodically, and that implies getting such knot through the pu tubing. Just a wider entrance that has no sharp edges would fix the problem, It's unimaginable that the bar design is so clean and simple and they overlooked this. Kite lines don't like sharp edges!!
If the 2017 bars don't have this fixed... well I would really know Pete's opinion on why they didn't fix it even if it's so apparent to them. My first guess is that fixing this implies that the design is wrong on the 2016 model, and they would need to recall all bars. The PU tube entrance is not easy to replace so they would need to either take the bars in or replace the whole thing.
To end the rant, I'm not so mad that this problem exists. If Cabrinha sent me 3 replacement bungees, I know that I just need to replace that piece every season and they are being proactive about safety. I'm mad because Cabrinha not only didn't acknowledge the defect, they actively told me it's my fault with some sand and other environmental BS.