The "issues" that you've mentioned fall into the category of why one buys a fiberglass replica body, which is the ease of making modifications for aesthetics, or to correct fit & finish problems. Provided one uses the right techniques, cutting back all gel coat plus nominal 1/2 of the thickness of the parent material, extending edges and building new surfaces with mat & resin is really not that tough and will be strong. Some time back we had an excellent thread where one of the guys was restoring a mid-50's Corvette, and that thing had problems, like the hood profile being off from the body line by a bunch. As I recall his "fix" was to wedge cut the inner panel bracing which "freed up" the outer panel enough that it could be "pulled down" or "pushed up" to conform. Once the amount of push & pull was measured the panel was locked in the necessary position and the inner bracing was re-glassed for strength and the panel fit exactly. Unfortunately the hood was not the only place that had become mis-shaped over the years, so he worked similar magic on doors & deck, too, plus headlight trim, tail light trim, and bumpers.

The point is that glass is easily worked to fix just about anything that might be wrong, and fix it right. Just gotta jump in and do it, or back away and sell as a stalled project to someone who's willing to do the work. How much fun is it going to be to finish half-assed, and every time you take it any where explain time after time why you chose not to finish the project? I would think that would be a very frustrating way to participate in the hobby, but to each his own....