Personally, I think they're worth the isk now depending what you're planning to use them for. For example, we now have three legions in our wormhole expedition team. They can each solo class 3 anomalies quite quickly, which is something those pilots couldn't do with another type of ship.

There are a few very useful things they can do that other ships can't or that other ships have trouble with, like the command recon and the invisible setups I listed near the end of the gallery.

"Except they cost helluva lot and attract entire sectors worth of enemies camping you around the clock just on the remote chance they might get on the killmail."

This.

Whenever a T3 ship is reported in the local intel channels, the entire constellation suddenly comes alive with probes and gatecamps.