This is the reality of things. A programme of remedial work on the 92 stock should have been done years ago, the issues with this stock have been ongoing for many years, virtually since new. The Chancery Lane derailment was 25 years ago, and issues were known before that.
Whilst it may be badged as an “improvement programme”, in reality the work being done is to keep the fleet afloat, in the absence of any replacement. Whilst a few opportunity works have been done, be under no illusion that virtually all the work on these trains is things that are *essential*, rather than nice to haves. In essence they’re doing the minimum to keep the fleet going, and thereby avoiding either a drastic decimation of the timetable (planned or unplanned) or having to close the line altogether.
Remember also the aessibility work was meant to have been completed by 2020, so that has well and truly ended up in long grass as well as reliability work.
Having said all that, I agree with your point. It does still smack as a half job.