However, its certainly possible that if Trump does not control 50% of the delegates, changes could be made that harm Trump's chances but dont harm Cruz's chances. Which would make sense - that is how politics works. Whining about it won't help - working to encourage delegates to support your position in these rules fights is what needs to happen.
Trump has been badly served by his campaign team in this regard, and Cruz's team is doing quite well at it. Will Trump's recent team shakeup make a difference? I think they are paying more attention now, and may be doing better work in the background, but Trump spokemen continue to push the unhelpful whine message.
Doesn’t matter if you call it an oratorio or a “whine” — if the electorate walks out on you due to the issue that it objects to, you do not have their support.