Boba execute messing up everything

You can't compare the two. AoE effects like Maul's and EP's mass stun create a much larger scope of balancing issues. You can't just say one ability should work exactly like the other. Boba's execute revive mechanism is a clear and direct counter to revive... that's it. Stun and daze have other benefits and the stun/daze/assist change was to keep things in balance. It will all boil down to how they see it with revive. They could very well see it as too OP. Throwing a wrench into the revive RNG with execute seems appropriate to me with such a specific counter ability.