On Tue, 12 Apr 2005 22:22:26 -0400, Jamie Smithi scribbled this interesting note:
A properly installed closed valley will last as long as your roof will last.
You are correct. You need additional soffit vents.
I've seen but never use the ventilated drip edge. I don't like the looks of it. Seems to me that it would require frequent cleaning to clear accumulated dust. More soffit vents or even continuous soffit vents would be better.
Hope this helps.
-- John Willis (Remove the Primes before e-mailing me)