This has nothing to do with snaps. It is rather a wanted security feature for protecting users having bad PDFs. More here and here.
Now as this is cleared, let's talk snaps.
Some might know that I went to Montreal to the snapcraft summit. We expanded our relationship with Canonical and the Snapcraft project. Manjaro 18.1 will feature Snaps by default and also will ship some Snaps on the ISO. This can already be tested with our XFCE ISO. This is also part of the new direction of Manjaro, we are currently discussing internally for some days now. As Canonical is changing their way and see us as a partner we all benefit from it. This already shows in their store.
The dependency of snapd for our manjaro-tools is currently needed for opt-snaps support on our ISOs.
To push Manjaro our Core-Team takes decisions which may not look for all in their interest but make sense for the bigger goal we have in mind. Lot of changes are coming ahead and we will include the community partly in our decisions.
We have to move forward and Canonical is a great partner to achieve this.