She looks very nicely worn, Glorfindel!
On your observation about the exhausts, I'll second Chris, except to say that use artist's chalks for mine, rather than commercially-prepared pigment powders. Six of one, half dozen of another. But either way, it's the same advantage--a good level of control, to be able to undo the effect, if I don't like the result. I use the chalks for exhaust staining and muzzle blasts. I've even used them for fading.
On the canopy gap--I had a similar problem with my ICM Mustang (copy of Tamiya's). I was able to get around it by filling the gap with white glue before I laid down the main colors. The main colors then hid the glue pretty nicely.
On AM--don't give up on them yet. I think there are just as many out there who agree about the instructions as will say that they were no problem, because they tend to build in their own sequence, anyway. They did have tips and clarifications up on their old website, before they went out of business, but I don't think the instructions did them in. I think they weren't able to keep up financially, to provide the quality they did, for the sales volume they had. But the kits build into beautiful models. I have the TBF, albeit as Italeri's later license-built pop, I'm looking forward to building that one.