IOs have an odd set of skills in my opinion, they possess both JTAC and Research even though both of those skills are not utilized by them all too often.
I believe a simple tweak like removing Research and adding something like Medical 1 in return so they can know if some bodies are reviveable and making that expensive injector pouch in your prep not be an automatic lurker tackle if you want to bica yourself.
JTAC is also often used by FTLs and SLs and there is no point for you to use it in high pop hours and ideally would be reduced to 1. Once more I’d propose an increase to construction 1, medical 2 (So you can act like an SO) or leadership 2 (Similar to SOs)
I think this change won’t make a big impact for IOs, but would be a good quality of life considering you never get to really put those skills to use that often.