An effective aircraft like the Chinook HC2 as Released To Service? Prone to UFCMs, jammed controls, and a FADEC that would cause uncommanded engine shutdowns, power downs, and worst of all for a helicopter, power ups?
Or like the Nimrod Mk2, with a fuel gallery fitted with notoriously leaky fuel couplings passing through a dry bay(!) with (contrary to the Regs) a source of ignition?
Or like an AT aircraft with no ballistic fuel tank protection whatsoever, capable of being destroyed by a single small arms round?
Competitive aircraft all right, but for what competition, the Aunt Sally War Games?
You may see yourself as capable of dealing with any or all of those shortcomings but I would rather see you using all of your capacity against Her Majesty's enemies, and have these shortcomings made right before your Service ever gets said aircraft in the first place. How would that make them less effective?