I've been wanting to playtest ever since the playtest was announced. However, the past year has been a scheduling nightmare for all of my regular groups. A group that used to meet every week like clockwork managed a total of four sessions over the course of a year, for example.
Thus, finding a group of people who both wanted to playtest, and could find a mutually agreeable time to do so, has proved difficult. The limited time we are able to get together tends to get spent on the game we're already familiar with and the campaigns that are already in progress, rather than getting people up to speed on a new system.
However, I've kept up (for the most part, I admit to not having looked at the Barbarian yet) with what's going on.
I responded neutral in terms of my perspective... there are things that I've liked, things I've disliked, and there are elements that have been in place (or absent) since the first package that I still find questionable.
I think that the eventually result will be a game that I think is at least worth looking at, but that given my current gaming situation it is quite unlikely to be a game that any of my groups automatically switch over to, even if I end up preferring it personally.