When people have absorbed the physical elements of the plan, and the headline journey times, attention will turn to service planning and deliverability, neither of which got any airtime in the report/announcement, except the repeated insistence that benefits would appear "earlier" than on the old plan.
I'm still not sure how Sheffield can get the same 87m journey time now it has to run via Derby on the MML.
NR will have to work out a programme that delivers TRU, MMLU and ECMLU in parallel over about 10 years (CP7/8).
They have a habit of getting overwhelmed by the sheer complexity of major upgrades (WCRM, GWML etc).
"Digital signalling throughout TRU and ECML" is an easy phrase to say but can NR organise itself to do all that in a meaningful timeframe?
There will also be huge disruption on each of the upgraded routes for at least a decade, as was the case for WCRM.
On the services front, has any TOC, or NR System Operator, had any input to these plans to say what if feasible and what isn't on the classic network?
What happens to the overall pattern of (eg) XC and TP services on the routes to be hacked about?
What does 140mph do to capacity on the ECML? The plan talks about 7/8tph, and 12-car trains.
The solutions around Manchester, Leeds and Birmingham look particularly vague, with new connections here and there but no overall service vision.
There was no illustrative service plan in the report, in terms of frequencies and stopping patterns.
It also means that the HS2 TOC (nominally Avanti today) will have to plan services on the northern MML to Leeds, but not to York/Newcastle.
Edinburgh is left up in the air: the plan sort of endorses the WCML route via Golborne, but the ECML upgrade does change the balance.
There will also be a major impact on train procurement and cascade, another topic not mentioned in the plan.
I suspect there may be second thoughts on some of this when the train planners get to grips with the network being proposed, and its consequences.