Thanks for the compliments, I'm hoping connary reads this too as my mod (IEX) humbly builds and extends upon his... Now onto the questions.
Aikidoka wrote:It is mentoined, that the view distance should be set to "Medium", can you tell me why? If my PC can handle the graphics part (I've got a ATI HD7970

) with ease, why should I turn it down to Medium?
Some of the sectors still have fog and I thought these looked more immersive if the setting remains at Medium. Having a greater view distance with IEX will not break the mod however and apart from the usual performance hit (if any) it should be still good to go. It's basically up to you, decide which view distance you prefer and enjoy...
Aikidoka wrote:If you release new updates, is a new restart required to get the new content into the game? I thought I have read somewhere, that you don't have to restart, but it is recommanded. Here again why? Is there some content which doesn't gets activated?
Image textures and object files are read during every startup of each gaming session regardless whether it is a new or old game, and so any changes to pre-existing named textures/objects will be seen in-game. Often some of the base textures & object files are simply replaced with updated ones with each new release of IEX and so a new gamestart will not be required to enjoy them.
However... sometimes I also alter the positions/characteristics of suns, planets & gates as well as adding brand new content to the x3_universe map. These changes will not appear in any new game as an existing savegame already has the map information stored (along with ship/station/sun/planet positions etc. etc.) and it is not refreshed.
So in conclusion, a new gamestart will pick up everything as intended. But an existing savegame using an updated IEX cat/dat will benefit but won't be quite as 'pretty'.
Let me know if you still need more information.