welcome to the glamorous world of TOG i suppose.
pascal has done a prototype to use ICC/argyll to describe arbitrary colour transforms:
but i would not call this an “industry standard”. also i wonder which part of the old industry this may have been. i thought every hip kid in 2015 used OpenColorIO instead of ICC based workflows. maybe this is movie vs photography.
i suppose the fixed point/integer argument is valid for 8-bit input. in this case you don’t need to round to the nearest values or interpolate. i’m not sure it is a very good argument here though, it sounds like an implementation-specific off-by-0.5 rounding issue.
going forward i suppose you could try to make more clear in your writeup that you’re working with artistic/film emulation luts with high frequency and abrupt changes. now, your intro begins like "Color calibration and correction tools " which probably mislead the reviewer to think you’re talking about colour calibration instead. these luts might be smoother, much more well-behaved, and only work on a specified input bit depth. in any case a discussion of opencolorio/lut profiles/icc would help.
in general, SIGGRAPH/TOG is a very excited environment. if you get reviews that you see as unfair, it might be because the reviewers were not excited about your writeup. this may be lack of “wow factor” in the application or in the technical contribution. have you considered VMV, or CGF? deadline for eurographics short papers is 20th of december…
good luck with the submission.