Threading at less than +3, Is it wirth it? Options

[lunavoco]

So my Technomancer threads a Complex Form and gets two hits. My CF went from a rating 6 to rating 8. Because sustaining a threaded CF requires attention, I recieve -2 to all dice pools while maintaining this higher rating. Isnt' this a 0 net gain?

I suppose it's cool for threading CFs that the target rolls against like stealth, but for CFs you use it seem counter-productive.

Edit: Sigh. If anyone can tell me how to correct the title to read worth instead of wirth, I'd appreciate it.