BOSS VS enemy hero

[Nirual]

I've never been much of a fan of boss fights for exactly that reason.

On the upside, they provide an unique type of battle which can be interesting, at least the first time. But I've seen enough of that damn spider they keep reusing. At least in AP it was optional (and replenishing your troops afterwards not as painful).
But the rage restriction just feels really arbitrary and doesn't really make the fight more interesting.

WotN excuses not being able to use rage to "make it fairer for the boss" but considering rage abilities are usually better against groups rather than one guy, I really doubt that's actually the problem. Its probably more that the rage abilities just aren't coded to work properly against a boss.
If that is the case, they should've just made the boss immune to rage abilities and allowed the use to thin out the summons, which most bosses have plenty of anyway.