Yes, may I help you?
That's why I put "unbeatable" in quotes.
2) Valor buff. Diablo 3 was advertised as having a wide variety of skills that can be swapped in and out at any time, even in battle (with a small delay for use). This allowed greater variety in the abilities that champion mobs could have and provide greater challenges for the player. You also then provided a Valor buff that is supposed to encourage players to kill more champion packs. But oddly you choose to have the valor buffs be removed if the player changes their skills (or even moves a skill on the hot bar from one position to another). This goes against the entire design of the buff and the goal of having players kill as many champion packs as possible, Why was this decision made and with what logic?
This was actually a decision we made based off player feedback. On the one hand, there's a lot of enjoyment in being able to swap your skills at will and tailor your builds to the environment around you. On the other, there’s also gameplay to finding a build that really works for you in a variety of situations.
During beta, we received a lot of feedback from players who wanted to be able to swap skills any time. We also had a large number of players who wanted to have a sense of their characters "build," or some sort of build identity -- especially at later levels. We understood both points of view, so with Nephalem Valor you can still swap a skill out at any time, but there is a penalty for doing so (i.e. losing your stack).
As sort of an aside, we know that it can be SUPER frustrating for players who use Elective Mode to lose an NV stack due to a poorly-placed click near your Skill bar. Because of this, we're looking to add an action bar lock for Elective Mode in an upcoming patch.
Speaking in general about monster affixes:
The intention is for there to be differences in the difficulties of the monster packs. Some are hard, some are easy -- and some may seem impossible. When you are first beginning Inferno, you can pick off the easy ones without much challenge, but you may have to skip some of the harder ones. That's okay. As you become more powerful, you can survive better, deal more damage, and take on some of the affix packs you previously chose to avoid. And after gearing up even further, eventually you can take them all on. It won't be a cakewalk, but you won't run in abject terror the next time you see that Invulnerable Minions combo pack sauntering your way (okay...you might run a little). Certain monster affixes will also punish certain skill builds more than others, as many of our affixes do.
We've been watching feedback closely about all the affix types and we've seen a lot of responses to concerns such as "I have no problem with them" or "use skill X instead and you'll be fine" or "I used to have trouble but then I got some X gear and now I'm fine". This is what we intend to happen over time.
Speaking of Invulnerable Minions specifically:
All that said, we definitely are paying attention to your feedback (as mentioned earlier), and we'll make adjustments to monster affixes as we see necessary. We will always intend that some affixes are harder than others, and we'll mostly be making adjustments to ensure some affixes aren't radically out of line.