Depends on special cards. He is better than TAA. But TAA has strong link to Salah Wijnaldum and VVD and Perfect link to Gomez.
Walker only has strong link to Otamendi and Gomez, but Perfect link to Sterling.

Also Zanetti will be available soon and many people are patiently waiting for him. Which will give them an endgame option.

So it's a tough spot for me. If we get another crazy BPL Sbc or Special cards which would make him more viable a bigger rise could happen. Otherwise it would be to risky for the little roi you'd get from such an investment for me.

But it's your choice