The cli users have the option to "getrawtransaction txid true" in order to find valuable information about a transaction that could be theirs. This is a very powerful api call that effectively eliminates the need of an electrum server if someone wants to check his tx sent to coldstorage or a mobile wallet.
Do you think there would be any consensus in adding such a feature to the Bitcoin Core GUI? Something like Help -> Verify external txid. This would greatly increase the use of Bitcoin core for the ease of validating a transaction.