There is a chart to roughly check your signature, as well as a Xert ratio to give a rough check of your signature and I think it’s broadly ok.
The shape of the ranking spider is partly driven by the fact that some athlete types are expressed in w/kg (which disadvantage heavier riders), while others are in absolute watts.
For signature accuracy it’s a good idea to have different types of breakthroughs, from the very short sprints out to 10 minute or so efforts (not that it needs to be a steady 10 minutes, but ideally drawing MPA down over a longer time and keeping it low as long as you can, rather than 10 minutes with a small MPA drawdown followed by a sprint)