Later army detection / equipment caps
I did a test and found out for sure that it doesn't go above 90% with hero bonus, so it's capped at 90%.
What I mean exactly is.. Having a commander which has 90% later army detection without a hero and then adding a hero which has 15% later army detection won't make it 105%, it stays at 90%.
I didn't test if same applies for gems but 99% that it does.
It would be nice from GGs to tell us what's capped and what's not, so we don't waste time and resources finding it out ourselves.