Rapid KL seems to be more transparent about bus disruptions due to road closures etc. But like the recent (21-23 July) Putrajaya Line issues, they do inform the public and fix them, although they didn't address the "why". Maybe they keep the post-mortem details internally to avoid lowering the public's trust on KV rail services.
Hmm... that makes sense. Now I think of it, I do kind of remember someone(could be Anthony Loke himself) mentioning to rakyat to expect issues for a couple more months, but then when rapid KL refuses to explain the whys it's starting to look like they are trying to hide things. They handled the Masjid Jamek-Bandaraya rail issue really well, although I guess that was caused by an external factor so it clearly wasn't their fault.