I think Smart Consensus is preferable as it implies as you point out, this is the better version of the alternative. However consensus is a term not broadly understood or used outside crypto.

Soft contracts seems to convey weaker or “less” safe or less enforcement, which could be interpreted as your investment is at greater risk.

Smart Contracts uses two well known terms, so even if their are no contracts, people assume they understand.
A different version of this combination using terms common people understand to convey equal safety but unnecessary parts have been removed like lean or thin would be interesting alternatives.

Thin Smart Contracts or Lean Smart Contracts adds the notion of an improvement on a product which is well established and has name recognition, but suggests un-necessary elements have been removed. Which I think is the point your making.

This allows you to take advantage of all marketing which was done before you to get people to “recognize” your product as something they know.
And every time they hear “Smart contract “ they may think of your product and say to themselves yes I have heard of Smart Contracts and I know of an improved version.

This also allows people to do your advertising for you, as they seek to spread the word on your product to show others they are keeping up with the changes in the niche, they are more knowledgeable then their coworkers or competitors..,

What do you think?