"Jay Wilson just tweeted that there will be no PvP-specific gear."
So what it means is... we have to gear up for PvP with our PvE money (or real money in some cases :D).
How would you invest your money for PvP if you had to spend it right now?
Yes i realize that we don't know nothing about PvP yet and i know that they will probably announce some more PvP features and it can change a lot but right now i would invest (as a Barb) in all res, life regen, thorns, vit and block.
Cindercoat with 3sock, all res and life regen + stormshield with max block% and high vit + good doombringer.
2) Look at WoW vanilla, same thing happened there (official PvP took a while, in the beginning there was only Hillsbrad Foothills or so, battlegrounds arrived later). With the advent of PvP, CRIT and HP became important. Therefore, items with crit chance, crit hit damage, but also items with vitality, life%, allresist and armor will become more expensive. What that means in return is that stuff like life regeneration, attack speed etc. will receive less attention - they're not useless, but for PvP people will focus on other gear. It's kind of about "deal one extreme crit that kills my enemy" vs. "survive against the insane damage spikes".
I think string of ears might be dumb. 20% melee reduction can be a big deal against a monk/barb
Not necessarily. A FoT / cyclone monk is 100% lightning damage, and there's a bunch of barb runes that aren't physical.
I'm not 100% sure on this, but I don't think that an attack has to be physical to be considered melee. I think attacks are classified first as either melee or ranged, and then sub-classified by elemental type. I also believe that physical damage is technically considered an elemental type, as there are some ranged attacks that are physical, like demon hunter's nether tentacles, etc.
[...]PvP consumables, like elemental resist potions and such.
Or, if you've played MOBA games, especially League of Legends, stat-enhancing buffs you can bring into each individual match (e.g. +X% bonus to dexterity, +X% bonus to vitality, +X bonus damage against Y-type of opponent, +X% resistance to Y attack, etc.).