How are these out of the saddle?

I've always wanted to try dirt drops but my top tube is far too long to use those. However, the Jones Loop (possibly the SG version flipped) seem like a good way to get that position.

However, are the bars too much in your lap for out of saddle stuff (without a stem swap)? Do the still descend fast? I'm very much an AM rider and don't hold back when my bike us pointed down or up.