You're right and wrong.
It will be 2tph on both routes from Bristol TM with mock up timetable produced by the DFT uploaded to one of the IEP threads on this forum.
I've corrected the chinese in the quote!
The following supports your point so you are quite correct.
Here is what I dug out from the NR site.
Project reference code: WW024
Output: Station capacity
CP5 output driver
The business objective for the Bristol Temple Meads station capacity review is to understand
current and future capacity constraints. Demand is expected to increase following the
introduction of the Intercity Express Programme (IEP) electric Super Express Train (SET)
services in 2016, and specifically in 2017 when two new fast trains per hour are introduced
from Bristol Temple Meads to London Paddington via Bristol Parkway. Increases in local
service provision, as part of the Bristol Metro proposals, will also contribute to this growth.
Scope of works
Provision on additional access and circulation at Bristol Temple Meads
Reinstatement of platforms within the Digby Wyatt Shed capable of accommodating
a 260m long 10-car SET.
Significant interfaces
Electrification
Intercity Express Programme
Dr Days Junction Filton Abbey Wood capacity improvements
Signalling renewals
Track renewals
The West of England Local Enterprise Partnerships Temple Quarter Enterprise Zone
places an increased strategic importance on the station area
Local transport network
Key assumptions
Bristol Temple Meads is a combination of Grade 1 & 2 listed buildings; it is assumed
the infrastructure changes required to meet the growth demand will be accepted by
English Heritage, Local Conservation Officers and other key stakeholders following
consultation
Wider development for the station is being undertaken with external stakeholders and
developed through an area Master Plan
Removal of Bristol Panel Signalbox in the anticipated timeframe
Activities and milestones
GRIP 3-4 during CP4 / CP5
GRIP 5-8 during CP5
It all looks pretty firm to me. The old terminus will be needed and no mistake.