happened too many times, that the trading partner got the cards before me, and since i get them last, after i mark them as received, i immediately get the chance to give feedback.
would be nice to be able to see some marker, next to trades, that says you have some actions to perform with your ongoing trades, some kind of exclamation mark, next to the speech bubble.

Second this. Probably 4 out of 5 trades I have to comment something to the effect of "Friendly reminder to leave feedback." Or else I won't get any. It's pretty frustrating.

Third this for the same reasons.

Agreed.