@filipole
In essence, you are right. The problem is in conjuring up a package that is suitable for a heavy user of FTTP. It isn't a problem that we (the general population of the UK) have had to cope with so far.
The way the market for broadband has developed in the UK means we have very much gone for a model where basic access, at any line speed, is as cheap as chips. Everyone pays the same cheap access price, whether they can get 512Kbps, 2M, 8M, 20M, 40M or now (at least while being trialled) 100M.
With this model, we then have to pay for usage - and even if it is hidden from us consumers by "packages", it isn't hidden from Plusnet - who have to pay BT for backhaul bandwidth across their network from exchanges to PN's pipes. The whole model - of having a) Peak-Hour Usage limits, b) Peak-Hour traffic management, c) Off-peak unmetered usage - is then designed to carefully control use of this "paid" backhaul. The main point at which control is needed is busy hour - around 8PM - so the concept of "fair usage" is
entirely relevent here.
Within this model, anyone not using their allowance, and/or not consuming their (managed) "slice" at busy-hour, is always subsidising the users who are wanting more.
Other countries do things the other way around: They have payment levels for different line speeds, with unlimited usage allowances (or hidden fair-usage policies); obviously the line speed becomes something of a limiter to excessive usage, but the cross-subsidisation is still an issue there.
Where next then?
You must remember that you are part of a trial with this FTTP thing; and one aspect of the trial is to work out how much usage allowance is needed by the different users. This information will lead to the development of commercial packages that try to balance a low monthly fee (which UK broadband consumers demand, as that is what they are used to) against a higher monthly allowance. Because usage is actually a cost in the UK model, they have to be careful about getting this balance right.
Plusnet already did this once with the FTTC trials, where the ultimate commercial packages are seen as costing £10pm extra, where the money must be split between the cost for the higher line speed and the higher usage allowance. But you've seen that those packages come with a bit more busy-hour control (via traffic management) than the non-fibre packages, right?
They obviously need new models for FTTP too, and will be working these models out from user behaviour in the trial. Your demands will go into that process, but whether anything will come out in time for you right now is another matter.
What I can be pretty sure of is this... while the UK follows a model of charging usage through the backhaul charges, you will not see a "cheap" unlimited package alongside a "fast" FTTP line speed alongside "fast" traffic-management rules to match.
Plusnet Customer
Using FTTC since 2011. Currently on 80/20 Unlimited Fibre Extra.