You need to address pricing, even if it is stating that we're not sure yet. As it is, it looks like you just want to avoid the topic.
Also, assure me that my diagrams can be exported, backed up locally, etc. Maybe a github integration or something similar? Anything that lets me know I'm not locked in. I won't allow my data to be locked in.
No.
Being backed by a longer term profitable entity that has related tech, is definitely not what most new SaaS vendors say. It's not a guarantee but it's a legit plus.
SaaS startup promises and unsustainable offers are a real and serious concern. But when a product is just getting launched, still in beta, there's nothing wrong with them taking some time to figure out the parameters.
The very thing you are demanding makes it prudent for companies to do everything they can to get pricing and promises right.