I wish they would kick the bubble a bit and add a time span at least for expansions. Maybe preserving the coherence of time flow by showing on quests when they logically happen. For instance:

MSQ 1st quest of ShB: "Year 2019"
And if you have not done the Crystal Tower questline, it would appear somewhere as "Year 2016"
(I have lost coutn of the real years, but the idea is to show that 3 years would have passed)

I'm not asking for RP event where we can wish happy birthday to the Twins, just adding a feeling of time that passes (because it does both IRL and in game). It's a good instrument in story telling when handled correctly.