That kinda sucks :/

Hmm, sucks. But still the game looks great, though. Considering Forza5 runs at 60fps while DriveClub is only 30fps, the graphics are even better!

I go with the former and latter. 

They don't have enough time = the game is being rushed?
This is dissapointing to see that this game thinks it can go head to head with new IP's (Drive Club), without the basics of decent weather/time cycles.
Although it could be fair to say they have different target audiences/directions, this is a necessity im my opinion.

Hell even GT5 had them, and look how many problems that game had. :/

I'd have to disagree with you there pal.
I think Drive Club will be a better game/have better graphics, but only time will tell. 

Just my opinion - not trashing you/trolling/hating etc.

Well, no problem with that - that's what forums are for! :)

Given that DriveClub will have "only" 30fps they can easily render more polygons on screen but still it doesn't look better to me.

If it is a better game, well... Given that Forza has a tradition of high ratings, DriveClub will have to deliver a lot of fun but I think it will be a good game, at least.

I used all of them because of the 1000 Club DLC and will use all the cars in Forza 5 at least once if they add a similar feature.

huh? why would you care?

My understanding is they haven't done rain racing yet because they don't have the same level of tyre data for wet-weather tyre modelling, and are pefectionists like that.

Could this have been rushed for the launch? Unfortunate, but all that matters is the gameplay.

Exactly, and Forza never failed in this discipline.