What does ICS have to do with grid size? Sounds like your issue was with the launcher or lcd density setting.
My issue is with ICS not looking very good on my Galaxy S. Maybe it has to do with the screen size, type, dpi, etc... my point was it doesn't look good. Even if I change the dipi, now my icons are ant-sized. It just doesn't look right. Some apps also suffer due to the hardware (e.g., Google Talk runs kind of sluggish).