Since the time table change, and the introduction of the 197s time keeping seems to have been much improved, with most trains being within 5mins of their time at Bidston, sometimes arriving earlier by a minute or two. The timetable allows more time for the journey, and longer dwell times at most stations (1 minute instead of 30 secs) and both the 197s and 230s seem to cope well, and being able to make up time when necessary.
There have been a few trains that have lost time "due to a problem with the traction equipment" - this has applied to both types of train, but seems to be the exception rather than the rule. There have been a couple of days with disruption due to slippery rails, and other, occasional, delays due to the trains being late from the depot - this has affected 197s coming from Chester, and also seems to be a regular occurance at the 230 swap over at Bidston at lunchtimes - why that should be I don't know, but there have been problems mentioned on here in the past relating to getting a path on Merseyrail if operations have drifted from the timetable. How necessary the 230 swaps are now I don't know. There have also been delays due to train crew not being available and at the right place when they're needed, also signal failures, flooding and a fallen tree.
All in all, to me it looks a vast improvement - more trains and mostly running pretty much on time.