[quote=@Dead Cruiser]
<Snipped quote by Hank>

Surely they still have ears and eyes in the field, at least in their home turf of Cryodiil.
[/quote]

Perhaps, but the lore doesn't support it. 

[i]With the death of Uriel Septim VII and his son, Martin, the 3rd era came to a close with the Blades fortifying themselves deep within Cyrodiil's Cloud Ruler Temple, as they waited for a Dragonborn to return when they would be called upon again.[/i]

When that didn't happen, they turned their sights on the Dominion, but it will be a while before that forms in the current point in the canon. 

Either way, the Blades don't have much of a role to play right now.