It’d be great to be able to set up custom notifications based on anything available to a transaction, as well as categories. E.g:
• Transaction from specific retailer, or where name contains X
• Transaction where amount is greater than X
• When category spend exceeds X
• …etc
I think Snoop offers this sort of thing.
Related and similar: Feature Request: set up a rule to send a specific notification when a specific transaction comes through - #2 by Fredbradley
This is part of extending smart rules, it’s in our roadmap and I think it’s a mix between notifications and actions. Like “put in groceries everything that comes from X and Y price”. 
Glad to hear it! I think the power is in the push notifications and in-app alerts based on custom settings.