What 'new' tracks do people actually like? By new I mean the ones built specifically for World RX at an existing circuit, such as COTA, Silverstone, Bikernieki, Catalunya, Hockenheim, Istanbul, Franciacorta etc.

Personally I think:
COTA - looks poor and not many places to pass.
Silverstone - left me cold, not the worst track but a poor replacement for Lydden
Bikernieki - I like, but the racing hasn't always been brilliatn
Catalunya - interesting joker merge and the corner after it, but the infield section is too slow and tight
Hockenheim - never liked it as a track but had some great races, including one of my favourite ever WRX races
Istanbul - terrible slow section that was just dust on tarmac, can't remember much else
Franciacorta - don't remember it too well other than it had some very quick bits and the first corner caused some carnage.