Ah well bags for sure would be a potential issue as I have never travelled through with one which I needed to reclaim, not sure I have ever even seen a baggage belt thing working as I am through quite early in the morning.
In terms of passport control on arrival there is none (presumably) because of the common travel agreement between Ireland and the UK.
Oddly enough when travelling back to Dublin we are expected to queue and show the passport.
The 15 minute thing is touchdown, onto a wee bus that takes you to the terminal and from there you just walk straight up the steps (past baggage reclaim) and out.