Yes, voting for the Return Proposal has its downsides, as you said. It increases the threshold for everyone. That's why I'm changing my vote depending on the current situation. In previous weeks, I wanted @deathwing's proposal to pass, so I haven't voted on the Return proposal. I temporarily changed it to prevent Splinterlands one from getting funded. Fortunately, Deathwing's proposal got some votes lately, so it got funds either way.