Colour Code everyone's Secondary trees in loading screen or tab (For clarity's sake)
The symbols are good and all but I don't immediately recognise which secondary tree the enemy or ally take with a quick tab. Or even in the loading screen, it takes a few moments to realise 'oh he took resolve as his secondary, he probably gonna be passive.' etc.
Just colour code the secondary and keep the symbols. I.E. gold for prec, red for domin, green for resolve etc. Would help a lot with clarity.