I would like to see the upload increased. I have 20 down / 1.5 up in my area. When CrashPlan discontinued their consumer service and pushed me to switch, it was going to take nearly 2 months to backup my data assuming I didn't use it for anything else. Maybe something more along the lines of 5 mbps upload minimum?
For cable, that is coming, though slowly. The reason it is asymmetric is because there isn't a lot of frequency available to upstream. So with DOCSIS 3.0 on a given node a carrier could easily have 48, or even more, channels of downstream (modems only support 32, but they can have more and map different subscribers to different channels) for 1.8gbps of total downstream bandwidth. Easily enough to offer everyone plenty of download speed. However the same node would only have 4 upstream channels on a normal split, or 8 max if they'd spent the non-trivial amount of money to increase the split. That is 108mbps for 4 or 216mbps for 8 (upstream channels get less bandwidth because of the way cable modems work). You can see why they have to be stingy. There's just not a lot available, and it isn't easy to expand.
Now DOCSIS 3.1 Full Duplex will solve this issue. It allows the entire spectrum to be used for upstream and downstream at the same time, and allows for high speeds, up to 10gbps. Thus they'll have plenty of bandwidth upstream and be able to offer symmetric connections. However it is a brand new standard, I'm not aware of any equipment that supports it yet, so it'll be time for the gear to be developed, and then to be deployed.