CPU and memory aren't independent on Suga. They're held to a ratio, so raising CPU raises the memory floor and lowering it drops the ceiling. Until now the only sign of that was the memory value moving by itself when you changed CPU, with only a block of text telling you why.
The sliders now shade the stretches of the scale you can't reach. Drag CPU down and the shaded bar on the memory slider grows from the top, shoving the memory thumb back into range. Hover a bar and it tells you what's blocking it and which way to move, whether that's the ratio or your plan's ceiling.