Personally, I like this design. The arms look like a completely natural addition, unlike the additional mouthparts on the Predalien design. If this had the Winston ridged head, it might have even been my favourite ever design, but regardless, this sculpt has to be the most authentic Giger-like sculpt potentially for big screen treatment, that we've had in decades.
I suspect it's meant to be the 'ultimate Alien' arisen by genetic modification: Agile and fast enough to be a predatory menace without being a big target, but with the additional arms implying it can potentially lay eggs. The best of both worlds. That's just my guess, though. Can imagine it can could a lot more horrifying scenes death scenes with those additional arms, too: Imagine it holding a victim in the air, before it, crucifixion-style, while doing something slow and terrible with the secondary arms, below the victim's neck. Wouldn't even need to see anything aside from the agonised facial expressions and ominous noises. That's total Lambert territory...
The tail's useful, but those hands give it something more than a massive prehensile spear to do things to victims.
Doesn't come across as top-heavy to me. Those arms look relatively light.