My Little Pony: Friendship is Magic - She's too good for you Discord.

No, it makes him more human.
People have a tendency to revert back to their old selves when they see someone from their past.
And Discord & Tirec have clearly met before.
Also, at that moment he realized he had a choice between having one friend, while everypony else still hated him and having to restrain himself,
& having one friend who planned to share control of the world with him.