I’d do three things only to Suzuka:
1: Make the home straight slightly longer with a sharper first corner, make the starts a bit more exciting and make it a little better for overtaking
2: Tighten 130R so it’s as hard as it used to be
3: Introducing a severe elevation change into the final chicane, rather like the new Bus Stop but less pants. OR, speaking of Bus Stop, how about make the whole thing like the old Bus Stop double-chicane, but a mirror version.
Oh, and give Degner 2 some run-off as cars keep getting stranded there after hitting the wall.