I think I'd prefer the square blue BG with the 3 squiggle S

I appreciate it might unbalance the design, but I can;t help feeling the STEAM sub logo (icon - the 3 squiggle S) needs to be BIGGER !

Strangely the 3 squiggle S on blue is one of the variations I don't think you have done?

To inspire confidence I still think that element needs to be BIGGER and not limited to the height of the text.