I'd say since smash.gg is already the established method of organizing esports events across a variety of game communities, despite being straight forward.
I could be wrong, but it seems like there's a distinction between perceived sugar (amount of sugar in drink) as mentioned in the study and perceived sweetness (how sweet the drink tastes) which is what you're referring to.
What's the distinction between multi-screening and multitasking in general? Is there something about "media" multitasking that specifically affects memory?
If it's not ready for evaluation then HN is probably your best bet since it would stay within the circle of devs. Twitter/Reddit/FB won't get you the open source contributors and critique you're looking for.
I almost always prefer the desktop app over the web client because my browser is so polluted with random tabs nowadays. Also google chrome has programmed me to feel that web clients will be slower and resource intensive (even though this probably isn't always the case).