The change log for 1.08 is up now, so we may as well start posting our wide-eyed dreams for the next patch! 
I'd like to see a better balancing of crown authority. Right now, there's little advantage to putting up with the grief of staying at absolute authority. I'd also like to see a non-feudal Byzantine empire with provincial governors/generals instead of landed feudal lords everywhere. I'm not sure how that could be done (special Byzantine rule putting feudal lords on republican succession except for the emperor, perhaps?) I can dream!
I'd like to see a better balancing of crown authority. Right now, there's little advantage to putting up with the grief of staying at absolute authority. I'd also like to see a non-feudal Byzantine empire with provincial governors/generals instead of landed feudal lords everywhere. I'm not sure how that could be done (special Byzantine rule putting feudal lords on republican succession except for the emperor, perhaps?) I can dream!