Is the SSD upgradeable in the 2017 version?

"Sadly both 13"" & 15"" Touch Bar models are soldered!

All of the Retina models have soldered RAM only the older non-Retina models have upgradable RAM. The newer Touch Bar (2016 & 2017) systems SSD storage is now soldered as well.

Rumor has it a Pro's MacBook Pro will be coming out which is hoped to have upgradable RAM & storage but we'll need to wait and see if Apple got the message when they intro'ed the late 2016 model and got a good scolding by the working Pro's who need more RAM, upgradable storage and USB-A ports."

The SSD is still soldered, Apple isn't well-known for making their devices modular.

What's the best way to let Apple know that this sucks? Is there a petition or something?

No in 13" nTB 2017 it's not soldered but I think even if you change it (assuming you can buy SDD with apple connector) it probably wouldn't work - same as wifi card (wifi chip is soldered ) - it's paired with mobo