I think the current proposal hurts Telluria’ usability and that’s sincerely not a move towards balance. will link myself about what I think it would be ideal to Telluria:
As it is they clearly intend telluria to be only a defense tank, that will end up like Neith. Does everything: heals, minions, damage, mana slow, but nothing good.
As for Vela, removing completely the extra damage rather than just reducing hurts Vela as a natural counter to fire heroes, which was maybe her best feature.