Quote History Hyperstealth were in the fray as a contender to replace UCP, ultimately OCP was adopted (Scorpion 2 off the top of my head).
In regard to the general discussions around thermal - its not a magic tool, it does work well if its not wet and back ground temps are well below 37 degrees C, however in hot dry arid terranes with little vegetation and lots of rocks it can be little more than an imager.
Understanding how, what, why and where thermal works is important to avoiding detection - if you lay down in cool open grassland you will be detected, however if you sit next to the base of a tree you wont (trunks hold on to heat collected during the day).
In hot rocky rugged mountainous regions, if you wear multicam arid you're the invisible man if you're careful with movement.
If you want to see weird and wonderful, have a look at german leibermuster - designed for use in urban combat in largely destroyed cities. ERDL, DPCU and Woodland are derivatives of it. That design more or less recognised the key elements of successful camouflage including reduced IR signature (using two different black dyes), the importance of horizontal patterns and the blurring of edges.
IFF is a problem but not a major one given that even in Ukraine the best equipped units on both sides have blue on blue tracking, add in low power scrambled radios (0.1w or less), plus basic planning and execution e.g. everything from specific whistles, code words through to clickers. All of this can build very good situational awareness thus reducing the incidence of blue on blue.
FEBA - FLOT and sectors are real things.