Yes there was! Plan it properly, get the electrification done, then order much much cheaper EMU's!
Go on then - I'm listening - how do you wire the GWML considering...
HSTs are getting tired - needing upgraded - getting uneconomical to spend big money on the runts of the litter - whilst some have some life left in them, squadron service is going to have to end in the next few years
A significant number of London - Oxford fasts need to run through to Worcester/ Hereford etc
A significant number of London - Cardiff services need to run through to Swansea
You've also got branches to Gloucester/ Weston etc
Air quality is becoming a bigger issue in London - all those diesels at Paddington aren't helping
You need years to electrify hundreds of miles of the GWML (which will include diverting services via routes that aren't planned to be electrified, e.g. Gloucester - Newport when you are wiring the Severn Tunnel)
If you could electrify the GWML overnight then you'd still have a number of problems (like what to do with the through services to Worcester etc)
And that's assuming it didn't go over budget/ they didn't discover any problems/ everything ran smoothly/ HOPS worked from day one/ all cables were well documented/ you had 20:20 hindsight etc.
I'm not convinced that "get the electrification done" is as simple as you think, nor that we could ever afford to wait for the electrification to be "done" before the first HSTs became uneconomic and needed replacement with something. When we electrified the ECML, the HSTs running on it weren't that old, so a delay of a year wasn't much of an issue. We don't have such luxuries left.
I'm out.
But I'm sure that your love of bi-modes mean you completely refuse to accept that!
You're one tactic here seems to be painting people prepared to accept bi-modes as a realistic compromise as zealots unable to see any downsides.
Well, that and the occasional references to the steep floors (that nobody who's been in one has worried about).
I can weigh up the pros and cons and can't see a better realistic flexible alternative.