I am just a bit confused by your post...you are going to 'ditch' your car because the KBB trade in value is dropping? Were you shopping for a different car and need to recoup the equity or are you just upset that the value is dropping so now you hate the car?
All new vehicles drop significantly in the first 2 years of ownership, especially the 'trade in' value. The rebates on the 2012 and even now on the 2013 don't help much.
If it helps at all to see the potential for a future value take a look at 2000-2005 Focii on craigslist to see how much they are going for compared to when they were new. They are holding steady at about 25-35% of original value and some have close to 200k miles on them.
I do, however, think that the DCT issues are devaluating the Gen III a bit at least here in the USA. In Europe they are very expensive cars!