I agree the apps leave a lot to be desired compared to Revolut, N26, etc. Instant payments in SEPA are likely to become legally the default in the next few years and it's bizarre that Irish banks are so behind.
I use Revolut as a wallet but at personal level there is simplicity in having a single bank account however and ability to make instant transfers to other Irish account holders via app would be a help. If it's done well it should support instant payments via QR as well. There are a few use cases for this, in particular merchants with occasional use or low turnover who don't want to deal with cash. Think sporting events, farmers' markets, takeaway trucks, charity collections, etc, where they don't want to cost and hassle of a card terminal. You have a QR code and the customer scans it, keys in the amount, and shows you the confirmation.
Anyway I hope they get this right as it could be a very nice feature.