Maybe I didn’t understand the explanation for the BlendParams, but I got weird results until I used the the metric I’d set my blendspace up with (in this case, passing it angles from -90 to 90). In any case, though, this was a big help.
Did you ever encounter any way of playing a blendspace in a slot or else blending it with the current anim? I’ve only done it used Animsequences and montages, but not blendspaces or plain anim assets.