SMIRF had calculated the over all position evaluation using the well known average piece exchange model values. During the last time I experimented with delegating the mobility parts of those values to the detail evaluation part. Thus there have been "-X" versions for a mixing of those approaches and "-0" for completely avoiding the mobility parts.
In short there will be a new "MS-174b-0" bonus version of SMIRF, which should play a little bit stronger then - as I hope ...