Yes of course once the minion is destroyed or dispelled the effect will disappear and everything will revert to normal. Note that any minions whose opening gambit keyword turned into intensify will also revert to their previous state.
Here are some cool combos:
Immense Pressure (I.Pr) + Mirrorim
I.Pr + Any Mech with Mechazor Progress
I.Pr + Bloodtear Alchemist
I.Pr + Zyx
I.Pr + Timekeeper
I.Pr + Calculator ()
I.Pr + Keeper of the Vale
I.Pr + Theoblue
I.Pr + Abjucator
and so many more…
Also minions that target enemies for (example Crossbones) can now target multiple enemies.