DOCSIS is asymmetrical so it won't ever go more than 200mb upload with version 3.0 which VM use, 3.1 allows for a 10G/1G but I think VM only enable 3.1 on downstream right now.
From what I gather they are moving away from the HFC DOCSIS setup to FTTP so I wouldn't expect much from them until they transistion, though to get classed as gigabit capable and receive government funding towards upgrades the upload has to be 20% of the download so there is hope of improvement.
Though the wording could also be read as they only need to provide 20% of the 33% of min download but that's still at least 75Mb upload on what they currently provide for Gig1 download.
I'm sure they would have to do more to remain competitive with FTTP guys who can do Symmetric 1Gb.
Your ethernet caps the port, full bandwidth is only available via multiple ports, so if you have a few things connected or stuff on wifi it would share between all those if you have a router with balance ability you can plug in two cables and get all bandwidth in to your third party network but not many have that and it would still limit a single stream to ~940Mb
They are moving everyone to FTTP over the next 7? years, at least until then RFoG will continue to be a thing, but once you have a pure fibre network and telephony is pure VoIP, then you can look at ditching RFoG and just using IP for everything, of course that needs CPE changes, so it's easier to do by attrition than throw money at the problem street by street. Between now and then DOCSIS 4 moves the boundaries to 10Gb down and 6Gb up, but i'd imagine/hope VM will transit away before they need to migrate, if they follow the Gig2 first trial then 214Mbit upload would make things slightly more interesting, but it requires physical hardware upgrades just as the 3.1 downstream upgrade did, given OR fibre is stuck at 900/200, then 22400/214 at a reasonable price point is still competitive, especially as most customers aren't upload orientated and symmetrical fibre is still a tiny part of the market. If they stick to the 2nd and 3rd stage trial's and remain on 52Mbit up for Gig2, then that's going to suck and it's back to waiting for FTTP to eventually arrive.