Technocritters are unplayable as written.
Basically their limits make them incapable of doing anything, like say a snake with 0 logic, so 0 data processing, so can't even make a Matrix Perception test, or worse, a dice pool of 10 in cybercombat, which is pretty respectable, but a limit of 1 and only able to do 1 damage with their 1 hit. Meaning at most an Ahi can do 2 damage, and only if it's lucky enough for the target to not get any hits. As a single hit avoids the damage altogether. And let's say they're able to thread infuse attack, with 5 dice, that means they'll only get 1 or if lucky 2 hits, giving them attack 2 or 3, and giving them -2 to sustain the complex form.
And all of them suffer from this in one way or another.
I honestly think the biggest problem with the Matrix is that decks are just too good. Like I can live with really crappy limits for technocritters and technomancers if only decks weren't able to get limits in the 6 to 9 range relatively easily at chargen. And it doesn't help that Matrix stats aren't just used for limits, but also double as DV for matrix attacks, dice pool for resisting being seen, and add bonus init to VR.