Its not something on TM's side, but a limitation of VDSL. The reality is that VDSL uploads are never 100% symmetrical with the download path due to channel bonding overheads.

On a slightly related note, I would like to share an example of NBN implementation in Australia.



Your eyes are not kidding you: a standard ADSL 2+ modem/router in a fibre installation.

The GPON that NBN Co uses (or at least Internode) uses has the standard 4 ethernet ports, but 2 standard RJ45 ports also. One of which is a ADSL port.

The concept: the fibre is dug into your home, which is usually terminated in the living room. If all the computers are upstairs, you'd have to rewire the home for ethernet. Else use a wireless router, which can be problematic.

The premise: Once you have cut your landline, you can use the internal wiring of the house for ADSL 2+ delivery. So plug in a cable from the GPON ADSL port to a wall socket, then upstairs, plug in your ADSL 2+ modem into the upstairs telephone wall port. So essentially the distance between the ADSL 2+ modem and the "DSLAM" is from upstairs to downstairs.

And you can have your internet access point anywhere you want.

While the ADSL 2+ modem can sync near perfect 24Mbit/s downstream, you're limited to 1Mbit/s upstream. Not too bad if you're in the 25Mbits/2Mbits plan, but that sucks if you're in the 50Mbits/4Mbits plans and beyond (I still don't understand why the links are Asymmetrical in NBN despite being fibre and all).

The good news is that one can use their own end user access equipment, with almost no rewiring needed. Downsides are limited speed that doesn't use the full potential of fibre, and ping times have about a 50-80ms overhead converting from ADSL to Optical.