Transform Increment Arrows/Buttons Missing...?

To the best of my recollection there have never been incremental arrows in the Transform panel and I would imagine it is because unlike such panels as the Character one that you show the dimensions that are in the Transform fields do not increase in fixed increments. They represent dimensions or locations that can be just about anything and in just about every case there would little reason for fixed increments of growth or reduction. If you do want to increase or decrease something by a fixed amount you can add, subtract, divide or multiply the amount in the field by an amount that you choose. For example you could enter in the width field 0.8069+2pt and the dimension would be automatically calculated for you and applied. You can do the same with the other mathematical functions I mentioned. Just be aware that to multiply you use the * instead of a "x".