He might be the better goal scorer but imo WW fit what ETH wants better. Tall, physically strong, can and willing to run and press a lot, can score a bit (like he did in the WC). Tbh the only thing I'm not happy with WW was he supposed to be tall and good in the air but turned out he's shit in the air.
Anyway imo as bad as he was WW was actually a fine signing considering the circumstances. Nobody expected him to be a good striker anyway. A loan signing for 6 months just to provide the number, the energy and maybe a couple goals here and there. If my memory serves me right before we signed him I said 5 goals and I could be very happy.