The answer is no. In fact they have reneged on their agreement to incerase the early morning taruin from Frome to Bristol to 4 coaches. This is where we are now:
Up till this week the capacity problem had improved slightly with the 8 extra trans pennine coaches, so whilst the trains have remained full to near capacity, generally people could get on the train. A passeneger on the train said that up till today the train service had not got better but had been less worse!

However as the service is being run to its limits with no fall back stock to cover for breakdowns etc, it only needs a breath of wind for the whole pack of cards to come tumbling down.

This week the 7:28 through Bath to Bristol which FGW made much play about that they were increasing from 2 to 4 coaches on a permanent basis has slipped back to 2 coaches. Yesterday It was three. Today it was 2 with the consequence that I travelled with another passenger in the doorwell (inward opening doors- they could't have been opened if there was an emergency) The train was filled beyond capacity and left some passengers behind at Oldfield Park, and left everyone behind at Keynsham.

So no change there then.