I think the pots and spending limits features should be on all bank accounts! And so should the instant card freeze.
Your balance is a highly misleading number, highly time-dependent on what order transactions come in and out. Whereas if you know you've saved for (eg) a holiday in a pot, it doesn't matter what your balance is, you just know you've got the money there and you can afford the holiday, so go ahead, and if not, don't!
A word of warning tough; I got stung for debit interest by Monzo.
I accidentally drunkenly paid for something just before closing time in a pub using contactless before I'd got Monzo set up as a payee on my bank account, so I was straight into a debit balance on the Monzo card. I got the notification and then drunkenly forgot about it. The transaction was £35ish but Monzo were charging me £15 a month interest; I had a devil of a time setting up monzo as a payee on the other account (card reader issues etc) and the balance had got to -£80ish by the time I could settle it.
Partly my fault, partly the other bank's fault, so not worth complaining to them, but Monzo's debit interest rate is absolutely punitive if you're a light but ongoing overdraft user. I think Starling is better in that respect. I've never let Monzo go into the red since.
Also I wouldn't put all of my money in there; I doubt it's anywhere near as well capitalised as the big banks.