It is my honest opinion that IS should be a bit rebalanced before people find out how to make the whole faction work (there is a lot of talk about that I guess).
Moving accuracy from 0.5 to 0.4 and target size back to normal since they don't die they just stay half HP and 4 models with the same god damn DPS while your units die.
It is so annoying to play against them even though they are not unbeatble. And even more boring to play them now when I can just build 5 IS at start, spread them out and mow down inf.
Just to point about I play 2v2 and 3v3 so idk about 1v1 and 4v4.
Normal RA would be 0.80, that's what they were before the overnerf. Balance team decided to revert half the nerf from 0.90 to 0.85
Personally I don't like messing around with core survivability because it's just punishing to four man Tommies (which were fine before any changes) and cements bolster and massed builds even more.