That sounds horrible, no thanks. Crit fluctuation is perfectly fine. They could maybe fine tune the crit stat, but damage fluctuation is normal and should be expected in stat heavy games like these. Reality is they didn't know what to do with SAM for the new ultimate fight and in order to deal with those spikes in damage they simply made the crit static by making them unable to get direct crit hits which removes those big 60k+ crits.