Croxley rail link revived? (Watford to Croxley Link)

Please see the comprehensive review that Herts County Council commissioned for the West of Watford Transport options:
Metropolitan Line Extension Alternatives
They have considered a tram from Watford to Cassiobridge, but not looked at the possible through connection to Rickmansworth (bay platform remnants) via the North Curve. To keep costs as low as possible (still not affordable these days) the track could leave the old bed at Cassiobridge, then use street running as far as Croxley station via the car park. The most expensive bit would be re-arranging the switches for the Rickmansworth station approach.

But, how much use would it get? Possibly more when East-West rail is eventually linked to Marylebone via Aylesbury. Still belongs in the FRIPAS section, unfortunately...