Ride height and load support can be accomplished through a variety of design parameters. Fewer, heavier and stiffer coils will give the same compression numbers as a coil with more loops and a progressive taper, but they will have different travel numbers. The progressive coils will have more stretch. If RE coils tend to lift out of the bucket on full flex with stock suspension, they are in fact not built right for an off road car, and travel would have to be limited to accommodate the coil. This is perhaps not what your average off road guy would want to do, but might well be acceptable for certain trail use. If the suspension is not stock, i.e., lifted, short arm or long arm conversion, then it would seem RE springs that lift out of the bucket are not matched to that suspension build.
Massive amounts of articulation are not always appropriate or desirable. Depends on what you want to do. The real question with the RE springs would be: how much articulation is available, with your suspension, before the spring leaves the bucket? If it is enough for your purposes, limit travel and capture the spring bottom to make sure it stays in the bucket. If it is not enough travel for your purposes, you have the wrong spring.
