i think we need % votes for SPS.
Because Return Proposal is like a downvote for other project. But maybe you only want to vote 50% for return and 100% for a project.
This should be changed in the future. And solve the barrier for devs.
The system should be efficent in the future.
Imagine if 100 devs would build amazing Stuff. Without % Vote it will never happen.
I agree with % votes on SPS and I'm pretty sure the developers agree as it was mentioned at Steemfest as something they see the need for.