As you can see, there is only 1 major feature (and what a feature!) and a tweaking. Compare this with the 0.6.0 roadmap.Balancing of values (costs, production rates, etc.)
User made AIs
This thread is not intended to create a long list of suggestions. Post what you think is most wanted from you and is feasible to be included in the next stable version.
I throw some (in alphabetical order):
New Engine Pool
New GRF (Air)Ports
New Passenger Destinations
YAPP
..and (because some TTDPatch guys are nagging)
Custom Bridge Heads
My logic:
These patches are the most requested in various IN and other builds.
Activity. (A lot of work has been done on them / there is increased activity in respective threads).