Can slivers traverse through an omenpath?

Sure. The hive mind doesn’t work cross planes, or really even that far away on the same plane.

About hiveminds. I get that naturally occuring hiveminds would be Green/White as it's a naturally occuring social structure, but wouldn't an artificial hivemind such as the borg be Blue/White since the hivemind is unnatural to the species it's being applied to, essentially usurping the natural order in search of perfection?

If the hive mind is technological or psionic in nature, we could consider blue.

You mention there each player casts Booster Tutor is played while Hive Mind is in play - what happens if the other players don't you know, have a booster? Seems like that could create a bad time with people feeling like they might need to buy one or other stuff there

If someone doesn’t have the ability to get a booster (and no one else can lend them one), they don’t open a booster. In a casual game, you could let someone get the remnants of someone else’s booster.

It’s my birthday, and also my first time asking trivia! Could I get any trivia on the design for slivers? Why do they look like they do?

Tempest had the very first in-house worldbuilding team, including a number of artists (including Mark Tedin and Anson Maddocks) and they were tasked with coming up with the look for the Slivers. The one constraint was it had to be a creature that could grow body parts as they’re shapechangers that gain abilities by learning how to form new body parts through their hive mind. That look is what they came up with.Happy Birthday!

"The audience is not a unified group mind." This a such an important statement in life, and it applies to so many more elements that just Magic. I hear people talk about other groups as if everyone in that group us part of a hive mind. Its import to step back and remember that every group is comprised of individuals. "I can't get a date because all [group criteria] are looking for [characteristic]" is such an unhealthy world view to hold. Thank you for imparting wisdom amongst the nerdery =)

Always happy to help.

You've argued many times that Slivers could not collectively planeswalk even if one of them were to gain a spark. But what about if a Sliver were corrupted by an Eldrazi? Since smaller/corrupted Eldrazi are just offshoots of the main Titans, which themselves can travel between planes, would a Sliver corrupted by Eldrazi grant its Eldraziness to other Slivers?

No. That’s not how slivers work. They’re shapeshifters with a hive mind (when close enough to one another). They can only gain abilities that comes from changing you’re shape. None of that helps you planeswalk.

If or when, eldrazi planeswalkers, legendary 5 color devoid eldrazi and/or sliver planeswalkers?

The first doesn’t make any sense as Eldrazi can already travel between planes through a different means. The middle one is tricky as it requires a set to have Eldrazi, devoid and five-color cards. The sliver Planeswalker seems like it would be unsatisfying as a hive mind creature seems like an odd creature to travel alone through the multiverse. Note that one sliver having a spark doesn’t grant the spark to other slivers. That’s not how their abilities work.

As long as they're a hive queen, being a sliver isn't a barrier to being sapient; nor, by extension, a planeswalker.

What exactly is the point of having a Sliver Planeswalker? Their whole identity is defined by their connection with the hive mind. So we can show how alone and isolated they feel?

What level of hive mind do slivers have? Are they sapient or are only the leaders sapient? Do they have free will? If so, do they lose it while hooked up to the hive mind?

Most of the slivers aren’t sapient, but the Sliver Queen was.

The question was not about a sliver affecting opponent's slivers. It was about a sliver affecting opponents non-slivers, i.e. everything that is not a sliver.

The flavor of Slivers is that they are shapeshifters that share a hive mind. That’s why Slivers grant abilities to Slivers. Affecting non-Slivers makes no flavor sense.