Are you on ADSL2/Streamyx?

Go google for VDSL2+ and click on the image. You will see that the speed of VDSL2+ drops to the speed like ADSL2 when it reaches a point. In rural places, the cable are pulled over KMs, probably around 3KMs or 5KMs. When the cables are long, the speed will drops. So if TM changes to VDSL2+ technology, it is still the same. What for do they need to waste money on the things which makes no difderence?

NO, i don't think it is a good idea.  Unless u wanna stuck with low quality line  for another decade or 2 decades. (don't u suffer enough from streamyx ? )

In  long term, the fiber optic is the ONLY and cheap way to go..
other methods just look like white elephant projects.
If they do deploy VDSL2+ widely, they  need a lot of  money to upgrade their devices, and old copper lines(which not in qualify or stolen) .  Exist streamyx  users  have to upgrade their modem (about RM300 or more).
for best case, most of the  vdsl2+ users (within 2KM)usually got only download:30Mbps and upload:5M-10Mbps .
if u r using 1Mbps now, i don't think u can reach that speed .
and （as far as we know about TM） i believe they will make the minimum price about RM200 or above like current price of  UNIFI PRO.

so, make no sense go for VDSL2+
UNIFI is your only hope, although the progress of its deployment is too slow. (they don't have any reason to speed it up, coz no matter how , they still earn money from u      )