They claim to be an alien, don't speak like another troll and have a different name, and Andrew recently mentioned Ophiuchus on his Tumblr
They also use the Ophiuchus symbol in that speech bubble! That's a pretty big clue!
I don't think it's a huge jump to guess that's who this is meant to be

Technically that pestering symbol is not a zodiac sign. I actually looked it up and I found some symbols that were Us with crosses through them...which means you're probably right.

Umm, dude, it's more like a Staff of Hermes/Asclepios, usually 'connected' to medical practices. So far, there's two proposed symbols for Ophiuchus, which is the aforementioned 'snake on a stick', or a U with a big tilde through it.

Source: http://www.suberic.net/~dmm/astro/constellations.html

It's more like a Caduceus (the symbol of commerce) than an Asclepius what with having two snakes, although it lacks wings.
But it is still basically a snake on a stick :U

I'm still guessing that's not a trolltag but...something else.

uranianUmbra [UU] began cheering gutsyGumshoe [GG] at 11:17

Cheering? That's something new.

I think it just indicates what UU was doing.

Yeah, obviously. But you see, it's normally either pestering or trolling.

Also, obviously the rebranding is something to do with the Condesce. This might be antics with how the troll universe influences the human universe, or something entirely different, such as the Condesce entering the human universe and reforming Crocker Corp or something? Wild guess, but hey.

Remember when Doc Scratch was talking about how the Condesce was going to be employed by Lord English and extend his reach in places he can't reach and how Nanna said that she knew the Condesce wasn't human? The Condesce was influencing the pre-scratch universe and the post-scratch universe for Lord English, except in the post-scratch universe it is more prominant.

Kid!Mom reminds me of someone I know in real life and it is pretty amusing

Miggles, I do realize that. Perhaps BettyBother (the chat application Jane uses) has a changeable cheer/pester type thing?

Or it's just lolalientech.

Oh man Mom is my new favorite character.
"THE FLAPPY SWINGY DOODAD!"
"wut"

She seems a lot more like Dave than Rose...

She seems a lot like Rose's mom.
Because she is.

Just like Jake is like Jade's Grandad rather than like Jade and Jane is more like Nanna than John.

The key traits of Rose's mom when she appeared previously were "drunk" and "gives presents".
Both of these are clearly present.

Well, she's not as classy now.

But that's ok. Drunkmom is always funny.