Eternal Tomorrow Replaced by This game, Awkward justice replaced by star * frost:

Eternal Tomorrow (Ending Version) from Tales of Hearts by Motoi Sakuraba isn't bad per se, but it's so very long for such a dull melody.  It wears thin.  Meanwhile 'This game' is the catchy opening theme to No Game No Life, so there's really no contest.  This is the second Konomi Suzuki song to reach my hall of fame, the previous one being 'Choir Jail.'

Awkward justice is even longer and even worse, so it's a no brainer.  Its replacement is the catchy opening theme to the beloved Kanata no Astra, making it even more of a no brainer.  I'm running thin on catchy anime opening theme songs, though, so I hope Awkward justice will be the last Tales tune in need of destruction.

I only have 300 songs left to process, with 5200/5500 completed.  So it's perfectly imaginable that there aren't any bad songs left in need of replacement.  If there are I've got a few candidates left in mind.