Just noticed this little quirk right here... Shifting out of Bear Form immediately resets Vengeance to 0.

Rebuffing, debuff removal or battle-ressing during phase transitions or inbetween pulls will all have a significant impact on a druid's threat generation. It somewhat echoes of the 3.x Resto Druid, who felt similarly punished for leaving Tree Form for any reason.

I would prefer if Vengeance was merely suppressed like Dash, instead of outright removed.

We could make shifting to Cat clear Vengeance but let it stay on in caster form. We're only paranoid about Cat AP for obvious reasons.