Cory Stuben of Munro hypothesized that the LCC needed to be lengthened with the addition of the heat pump system and that the added length/weight was creating leaks and/or failures during validation. Thus, Tesla added the band as a fix.
If the band holds long term, then I'm fine -- even if it's a little janky. Make it an official part, give it a number, and be done with it.
However, in that same interview, Stuben also said that in one of the three Model Y's he inspected the fix had already cracked. That's not good. Given the stresses and vibrations inside a vehicle, this is especially concerning for the longevity of a critical sub-system.
If it does turn into a longevity issue, I would trust old Tesla to eventually make it right and provided an updated solution -- even out of warranty. They stood behind the Roadster when they needed new transmissions and they took care of early issues with the Falcon Doors on the Model X. I just hope "new" Tesla isn't so focused on quarterly profits they overlook their existing customer base and early adopters. The "within spec" mentality has gotten a bit out of hand lately and the company appears to be more focused on investor returns than customer satisfaction.
https://teslamotorsclub.com/tmc/posts/4981436/