If we compare the two clubs as that is all that should matter then I would argue it weakened them
Before the signing of Wood we were 6 points behind them with a GD that was worse by 17 goals, now 7 games later we are 6 ahead of them with a GD that is only 2 worse
Wood in isolation isn't a good enough striker, that much is clear however he's clearly helped the team so it was a necessary signing and as things stand looks like the money was well spent.
He occupies defenders and allows us to play further up the pitch. Obviously next season I hope we have someone that can do that but also be a goal threat too