Completely agree. If I was given a crushed up pill, in a capsule, and was left in a room alone, in a double-blind trial, I guarantee that the 'better' pill would have me trying to make contact with people and fully enjoying my time. The 'new' pills would likely leave me sat feeling fucked, but not wanting to do anything about being alone. I have done this with many batches of pills and MDMA, whilst also trying many in a rave setting, which I would have fully enjoyed sober. In almost every case, I have found new MDMA to not only seem inferior, but in a lot of cases has left me wishing I hadn't taken it and has actually made my experience unpleasant. The experiences of friends, (many of whom knew nothing about the differences between batches of MDMA, and went into the situation fully expecting fireworks, but got the opposite) and even friends who are new to pills, and have no idea about isomers and precursors, yet have hugely different experiences on 'old' MDMA, versus new, which can't be attributed to any conceptions they went into the experience believing can't just be a fluke.
I've not just seen people have an inferior experience, but some of them have even isolated themselves and fallen asleep, on Dutch stuff (the original, white dominos being one of the presses, which were tested as being around 180mg of MDMA). As someone already stated, a lot of people who haven't had decent MDMA for a while (or ever), will not understand just how massively different the experience can be. This was something that didn't really happen, before the massive drought, before manufacturers came up with a new synthesis route. Again, this new route wasn't known to myself, until a few years ago, after I'd already started to believe that I'd either lost the magic, or something was different with the pills. It was only when others started saying the same, and I had discovered that certain batches had all the attributes that older pills used to have, that I knew that it wasn't just me.
This has been done to death now, but the fact new people keep coming forward, to say that they've noticed such a change, and then agreed that certain batches are 'magical' is hard to ignore. Sam, saying you've already got everything you can from MDMA, and not having tried any of the decent pills in question doesn't really prove anything. I'd be willing to bet that you'd probably notice at least something different about the experience, if you happened to stumble upon something special.