I would be interested in knowing the ISU's purpose here.
If the goal is to deter changing federations by forcing highly ranked skaters to skate in earlier groups, then wiping out the WS points should be enough. If the goal is something else, then wiping out the TES minimums seems to be a rough instrument because its effects would vary depending on the date of the skater's last competition before making the switch.
Fournier-Beaudry & Sorenson still have their World minimums listed. Kwanfan is just speculating that they could possibly lose them. That doesn't, however, appear to be the case. Even if they did lose them, F-B&S would still have time to compete at a small event prior to Worlds in order to get them. I guess it would be good for SC to double check and head into the season prepared for the possibility. I don't think missing 4CCs would be a major hindrance to a team as well established internationally as F-B&S during a season with so much turnover in the dance event anyway. The bigger challenge, I would think, for F-B&S will be getting the balanced feedback they need early in the season to develop their programs for major international competition and to make the argument--without an international season and ISU scores--to the Canadian judges at Nationals in order to hold off Soucisse & Firus.
Losing the World Standing points is a blow after so much work building them, but it's also understandable. Felt like a bit of a loophole that athletes had been able to keep them. I can see why it was closed. Denmark let F-B&S go willingly, and it made sense as they couldn't offer a path to the Olympics. This was really an unusual scenario in which the team had to make a choice after making every attempt to find another route.
But in a discipline as international as dance, I can see why the ISU would want to discourage easy swapping between countries. For a team like Smart & Diaz, for example, it could be easier to start out in Spain while Coomes & Buckland were still skating, but if C&B are done and with Hurtado & Khaliavin more established, qualifying for Worlds would be easier in Great Britain. So it's logical that the powers that be have eliminated the transferral of WS points. There's a cost for switching countries. It's not a brick wall, just a price to be paid. Something to discourage casual country hopping.