I'd like to suggest adding more sponsor slots.
These sponsors could have RNG based incentives and give only minor additions to cashflow compared to the current ones. RNG based contract lengths could also be nice.
More important than all that, however, would be the extra sponsor decals to have on your car, giving it more personality/brand identity.
I think this would be great to incorporate into the livery update.
Even if the sponsors don't give cash but rather something like +3% research, +3% driver recovery, or something even more obscure. I just want more stickers on my car!