Two concerns with the 3.0 upgrade:
In the upgrade process you lost my posting key. This is really annoying to have to have my Steemit login with me and then retype it on my phone. I don't want to copy it onto my phone otherwise for obvious reasons. So if I'm away from my computer I wouldn't be able to participate until I got back. Hopefully you will remember it through future upgrades.
I would strongly dislike the new 30-word requirement even if it counted properly, which it doesn't. All I'm doing is walking, it's not very interesting, and if it were I wouldn't want to write about it in a tiny window on my phone. If you want to combat the perception of shitposts maybe switch to comments like Musing did. Their service works much better that way and yours is even-lower-content.