Well I tried D-Derby in next cargame.. but my impression is, unfortunately still the same... The game mangaed to bore me even in that mode... I don't know how they managed it... =D ... it is just NOPE
I think it's because you aren't totally destroying everyone and everyone has equal chances of winning. You're dealing damage as much as you're taking it, which can be quite annoying if you want to cause total destruction yourself.
The tracks from DD (the actual races) are a lot more fun than the original Wreckfest races though and do give some great moments, like when the track suddenly becomes barely wide enough for one car to fit through, it's a lot of fun.
I'm looking forward to this mod more than to the completion of the game, if that will ever happen, from what I read Bugbear filed for bankruptcy not so long ago, though apparantely it was someone they owe money, rather than their own company. But who knows.