So my buddy and I figured while farming for Neraneth and Malbeth we would keep track of exactly how may heads dropped and tally it up. We had had the sneaking suspicion, after farming VWGT for spell power cure for quite a while that the drop rates were much lower than the old v12 days. After all, we had at least 50 runs each in VWGT and 4 sets of Spell power cure between us with no light heads for either of us.
Now the hard data. In 27 runs of VCOH and 3 runs of VWS (this is 120 person runs total since we have all 4 players data) there were:
8 heavy heads - 1 divines, 1 impenetrable, all the others crap traits
1 light head - crap trait
1 medium head - crap trait
This comes out to a nice even 1/12 for the drop rate but that is deceiving. It is deceiving because you would expect that rate to be even across weights and traits and I think it used to be in the V12 days when I have quite a lot of monster heads. This is clearly not the case anymore. Things you want like light or medium for dps, and Neraneth is really only a dps and PVE set, drop at a much lower rate than the undesirable heavy, in say, reinforced, which alone accounted for half the total drops. Your drop rate for what you want, say light in either infused or divines is much lower. The rate is certainly lower than 1/120 and just how low is really anybody's guess since you have to assume, based on the pattern established for weights, that drop rates have been designed to invert the desires of players so that the more ideal something is the less it drops. This did not used to be the case though there has been a definite pattern throughout the history of the game to that end. The first raid content, AA and HR, dropped gear only in weights that made sense for the set and in the best possible trait for each piece. The next gear, VDSA and SO came in only correct weights but with traits that were random with what appeared to be equal frequency of each trait. After that we had Monster heads with random weight and trait initially appearing to be again even chances of each. Now, on the revamped monster sets, we have random weights and traits with the data suggesting that the frequency of each is heavily slanted against desirable features. I have heard similar rumblings from the guys who have done lots and lots of VMA. Nobody has a mountain of evidence but it appears that the pieces you want, say flame staff or two handed great-sword, are much rarer than the one handed tanking sword that nobody wants and furthermore, a desirable trait like sharpened or precise is rarer than the horrid defending trait.
My point in all this is that I feel rather deceived by the stealthy and vicious changes to the rates of drop over the history of monster sets and also very suspicious in general of ZOS treatment of RNG. Having been burned before by the 1.6 update destroying my Infaliable Aether gear a month after I finally got it (same thing happened to Valken Skoria and Mephalas), and well before the Imperial City update replaced that seasons gear, I have a hard time committing to any effort obtaining high end gear. With the changes in theives guild I might be able to complete VMA with my main templar but given that past history of deciding that the extra 150 dps (1,500) that Infallible gave you was OP I am wary of the fact that I expect a VMA flame staff with the ability changes to wall of elements to be worth more like 4k.
In ESO you have to ask yourself, will you get to use the gear you work hard for?
What is the actual chances of getting said gear since it is clear they cannot be estimated from those of the same gear in say a different weight or trait?
I have frankly reached the point that I do not trust ZOS on any aspect of gear whether that be RNG or lifespan. It is my expectation that if I work tword a piece of gear I will either never get it or get it at long last to have it nerfed soon after. I am not sure what the solution for this is with me as trust is hard to build. What I would like to see is current published drop rates for each BOP item at the end of each patch notes, a token system to give a max amount of work independent of RNG, and a schedule to let you know when a seasons gear will be retired. While this is certainly extreme on the patch notes end I have grown to lothe the general tendency of ZOS to be opaque whenever possible. Tell me ZOS, why should I trust you enough to chase any of your carrots?
I am mostly pleased with the current state of ESO. Please do continue to ban cheaters though and you guys have to find out who is duping gold and how because the economy is currently non-functional.