Yeah, no matter how hard a company tries, it is not possible to escape the 'business triangle': Put 'Quality', 'Low cost', and 'Quick' on the points of a triangle. Cover up any one of the points & you can have the other two. But you can't have all three.
And it's easy for us to sit here & play armchair quarterback. As Santley noted - if it were that easy, the companies that make the mods would be would be making better helicopters themselves. I remember how things were in the hobby back in the 60s & 70s. The quality of RC products has improved by leaps & bounds since then. I am still amazed that we can get fly-by-wire helis that can do aerobatics in the house, and 2.5-oz fly-by-wire unlimited aerobatic planes that laugh at 20+ MPH winds. This stuff was DARPA territory just a decade ago!