Voted against. Boss abilities were set by donors during the campaign, and some were likely designed to be easy--eg. a goblin that drops a big pile of loot. I think there are a few kinks in the boss monsters to be worked out (eg. some of the spellcasters probably have zero spellpower and so their confusion spells always fail), but I don't think completely redesigning their abilities is inappropriate.
Also note that some of these guys spawn at level 1, and the kinds of abilities being suggested would be completely unreasonable at this point in the game.
Extra HP is fine (though I think they've already had an HP buff from an earlier RFE), and maybe extra XP or loot (though all of these were also possible donor rewards, IIRC).