What cheeses me off

[Pushka]

Deserves an upgrade imo.

Unlikely on a domestic flight with two people impacted.

 

[kookaburra75]

The A220 (and newer aircraft generally) now permit roller bags to be stored on their short side rather than "flat" on their length.
Yet, people still store them on their length, occupying much more space than needed.

That's good to know. On the first flight on the A220 I put our cases into the bins on edge, as I noticed they were deep enough, but the cabin crew flipped them over. You certainly get more in on edge.