I think you do designers a dis-service with your comments.
From memory the weather engine does not belong to IPACS so until they replace it with their own they cannot let us do as we please.
There are numerous scenery developers out there that produce fantastic products for the sim, most of it is free.
Granted aircraft and helicopter design is somewhat limited. Not by FS2 but by investment in time. This is mainly because FS2 is so rich in what can be done, it takes a lot of time to master and commercial developers don't want spend that time.