Many times when importing Tier 1 links SER is unable to verify them due to the different nature of the backlink in it. Sometimes it is shortened, other times it's a PDF online viewer etc.. So my suggestion is to add an option to mark an URL as verified so GSA SER won't check it again when checking for verified links, but it will show it as verified all the time.
This is especially useful when building links manually as T1 or using some Web 2.0 tool like FCS or Turbo Web 2.0 ranker. Many times the urls exist, but when doing a verify test GSA will remove them as failed, but I still want to build link on them. Or for example GSA is not able to recognize a shortened url in a tweet, but I may want to build backlinks to that tweet.