It will be completely different, particularly in the down direction, where currently there's an incentive to be at the back of the train because it is nearer the single exit from P7 (the old P4).
In the future all main line down services except the Newbury route will be on the island, and there'll be staircases/escalators to/from the 'transfer deck' (aka massive footbridge) in both east and west facing directions. These replace the existing footbridge which will be removed, so they aren't an additional option. Then the transfer deck position will be at the mid point of the train, and the route to coach A (assuming current HST) will be no longer than the route to the front of the train.
IMHO the new layout ought to go some way to achieving better passenger distribution along the trains - though no doubt pax will still try it on to be near the front at Paddington. But 50% of those who claim to be 'running for the train at the last minute' really ought to end up at the back...
(Oh and anyone using the lifts ought to end up in the middle!)
Ah yes, I remember the transfer deck, but I couldn't remember if this was additional so thanks for the clarification. It sound sas though there will be a slight improvement, but I expect that there will still be bunching around the stairs and escalators, after all, you get that everywhere!
