Instead of doing a 2-dimensional chart, we could just come up with the most important components to teams and rate each character 1-10 in each aspect. If I had to list the major elements of teams, I'd probably use something like this:
- KO Power (strength, difficulty in landing, safety)
- Offense (damage output, edgeguarding, combos)
- Priority/Hitboxes (size, duration, disjointedness)
- Assist (speed, disrupting, saving, 1v2)
- Durability (weight, gravity, comboable-ness)
- Recovery (speed, distance, difficulty to save)
You can combine these 6 stats into a radar chart for each character. With these, you can notice that if both characters on a team have a low KO Power stat that they will struggle in that aspect overall. Here's an example (you may or may not agree with the values, but that's not really the point):