Tom,
Must have misunderstood your first post - thought you advocated flying fixed pitch and retracting when you reach V2+10 or wassever...
Now see you say - either that way or fly a fixed speed (V2+10-30) to AA, then accelerate and take flaps on schedule.
The latter makes a lot of sense in my book, the former not ;-)
As for Venr being a rate rather than a gradient speed - where does it say so??