Glad to hear, I was specially worried about EIC being #8
About Spain, I think it clearly fits more in the tier of USA and Ottomans than the tier of Two Sicilies.
I mean, even Two Sicilies being a 'Major Power' seems a bit off. Maybe the solution would be to add another tier (for example 'Medium Powers') for better granularity?
1) Great Powers: United Kingdom, France, Russia, Austria
2) Major Powers: Prussia, USA, Ottoman Empire, Spain
3) Medium Powers: Netherlands, Belgium, Sardinia-Piedmont, Two Sicilies, etc ...
4) Minor Powers: Mexico, Brazil, Sweden, Denmark, Portugal, etc ...
5) Insignificant Power: ...
6) Unrecognized Power: ...
7) Unrecognized Minor Power: ...