The key word to the trinket change is persistent effect.
Cyclone isn't a persistent effect. You remove it, it's gone. Does not persist through removal.
There's a reason they used Solar Beam as the example. It's the most obvious (and currently it may be the only) one.
Other persistent effects:
Old Desecrate slow (no longer in game)
...and I can't think of any others. Unless DnD glyph works that way, as well? Though I have never seen a DK use it, so I can't say.
A "persistent" effect is one that sits on the ground independent of a player and is always on (e.g. fists of fury needs a player and has channel ticks) or NPC (earthbind needs a totem and pulses).
It's a very limited (albeit needed) change.