1) I already told Jussi in Online, but I'll repeat it here: I'd love to hear sounds of rain :-)
You probably won't record any of these in January, but if they made their way in some of the later beta/full releases, it would be just great.
2) Spectators could use a bit of optimization, they are by far the biggest performance eater on my system.
If set to 0, the game runs perfectly smooth even with 4xAA and all other options set to 100%.
3) All or most of the weather conditions (snowfall, rainfall, amount of snow, sun) should definitely affect the jumping (inrun speed) as already discussed in first part of my post
here
(btw, thanks for making the second part of it come true ;-) )
How about adding temperature to settings, just for graphic effects?
For example at -15°C, there would be steam coming out of jumper's mouth when exhaling and at 10°C, snow (if any) would be melting. Wouldn't that be cool?
4) I proposed this already for DSJ3, Online chat commands should be extended, I mean especially the possibility to ignore chat messages from a particular nation OR possibility to hide the chat window completely (not just during a jump). Would be really helpful if chat conversation between (let's just say it) numerous Polish players gets heated and messages jump out very, very frequently - it heavily distracts from jumping.