I've no doubt he could do better in that situation. He's not Pickford, but that doesn't mean he is too blame. The blame is on the CBs and the midfield there.
When I and anyone else who isn't part of this blindly critical sect of Everton fans see that goal, we see a Garner error and Keane ball watching (shock) - stuck in no mans land. We see Tarky caught on his heels and the striker therefore travelling without any pressure, slowing himself down and picking his spot not once, twice, but three times. This is what freezes Travers. 
Would Allison have saved it? Possibly not. Would he have made it more difficult for the striker? Definitely. He's a better keeper.
But then why stop there in search of perfection? Why not criticise every play, made by every player, because they could, feasibly have done better? Because that would be insanity. Son would have made a better fist of Illy's chance towards the end, ipso facto Illy has had a bad game.
Travers is not directly at fault for either of the goals. In fact on the first one he does brilliantly to save the initial effort. Doesn't make any other errors in the game and his distribution was good. That's all there is to it