Registrar TLD and Pricing Sync - show no longer offerable TLDs
Even in case of a scenario where multiple registrars are used, the Registrar TLD & Pricing Import happens on per registrar base. So, loading the TLD data over the registrar module will always lead to get all offerable TLDs returned. So at that point WHMCS could compare the list of all returned TLDs with the list of all existing TLDs of exactly that registrar. At least showing the diff (TLDs that are not returned) in the Registrar TLD & Pricing Sync would be possible without being disastrous for anyone. Even if the Registrar TLD & Pricing Sync does not care about the removal, it would be so helpful for anyone to just get these cases shown up just for information purpose.
Otherwise it is impossible for a reseller to identify TLDs in a list of probably over 800 TLDs that are no longer supported by a registrar.
I guess, that this idea is something transparent and not coming with negative impact, but with huge benefits for resellers.