I would like to suggest a few different new traits, if they are not already planned or in progress.

The trait I would like to see the most would be long, floppy lop ear type of ears, such as those on lop rabbits.
http://en.wikipedia.org/wiki/List_of_rabbit_breeds#Lop_Bunnies
Second ear trait I would love to see would be Scottish Fold cat-type ears
http://en.wikipedia.org/wiki/Scottish_fold

Second, I would like to see several different coat types. I like both the natural coat types, and also the bright un-natural coat colors. Examples of ones I would love to see are these:
Brindle (dogs)
http://en.wikipedia.org/wiki/Brindle
Tipped Abyssinian (cat)
http://en.wikipedia.org/wiki/Abyssinian_%28cat%29
Russian Blue (cat)
http://en.wikipedia.org/wiki/Russian_Blue_cat
Pointed (cat)
http://en.wikipedia.org/wiki/Point_coloration

Third, I would love to see long-haired coats, but I am figuring that is probably impossible due to the design of the 'roo themselves.