200 MB is quite a lot... but not, I don't think, totally horrendous as a straight forward upload... especially if you can manage 20 Mbps upload bandwidth... and increasingly that should be achievable for most people... especially with fibre rollouts and so forth.

Okay still probably near enough a minimum of a couple of minutes or more, I guess to upload 200 MB, allowing for fluctuations?

But, the issues your having with bandwidth over the VPN, I suspect, in a less-than-educated guess, are maybe due to more cross talk going on... or indeed, just that QM is not optimised for lower bandwidth situations and is "flatlining" in some way, when it doesn't get as much as it expects, quickly enough...