Regarding feats, if we aren't going to get an in battle feat progress indicator, then we desperately need them to be worded unambiguously.
Consider the S5 boss feat for 10 crits. Here's how it is worded:
"Score at least 10 critical hits in a row during ally turns"
Silly me, I thought I had to crit 10 times in a row. What the feat actually seems to require (after much testing and frustration on my part) is to have 10 ally turns in a row in which at least 1 critical hit is scored.
I got the feat by loading GMY up with CC and spamming his AOE until the whole team was dead. On most of my turns, I got 1 crit and 4 non-crits due to crit immunity. Before this, I failed to earn the feat using DR+Wat. I landed 15+ crits in a row (over 9 turns, I counted) until Wat's 2nd turn rolled around. Wat obviously didn't crit anyone, nor did he land a non-crit. But, during ally turns, I landed well over 10 crits in a row.
As worded, I would argue my DR+Wat strategy met the description more so than the GMY spam.