CT significantly pre-dates the recent Symantec issues, but yes, it does provide an excellent tool for providing evidence of misissuance [0] [1] - and that's the crux of it - in order for a certificate to be considered valid in a CT world, it must present proof that it has been publicly logged.

[0] https://security.googleblog.com/2015/09/improved-digital-cer... [1] http://searchsecurity.techtarget.com/news/450411573/Certific... [2]