I’m considering upgrading my speakers internal wiring

If "Peter builds high quality equipment with nothing spared" it can not be "Internally it’s not so great".

Changing wiring probably would affect the performance, but if to your liking? It is impossible to know unless you go through the process. Only you can tell if it is worth the effort. 

I sound like "Captain Obvious"

@waytoomuchstuff 

Great post. I appreciate you sharing your experience and well reasoned logic in assessing the potential risks and gains of doing these modifications. 

@erik_squires i was just thinking the same thing. Seems like you love your speakers and just want to tinker.  If it were me I would tinker with a kit.  Scratch the itch by building a kit speaker where you can use whatever components you want.  In fact, you could buy different types of wire and see what, if any, effect they have.

Manufacturer voicing is simply another take on sonic presentation, it may or may not correlate with your own preferences. This where you need to ask yourself what is missing or wrong with speakers in stock configuration. If you can't define what it is your looking for you're shooting in the dark.

As for expectations of the highest quality components based on price of speakers. Don't assume anything, have a look at those crossovers, if you've done your research you'll know quality. And don't expect the manufacturer to acknowledge they could have done better with design or parts used. They see you simply as end user, questioning them about such things will likely be perceived as criticism, you think they like that?  The above based on my experience with contacting any number of manufacturers with various ideas of mine. You may perceive it as being helpful in making their product better, they don't know you from Adam, you're not part of design team. In the one case where manufacturer adopted my parts mod, while somewhat irritated with me, the manufacturer did seem curious in regard to the specific capacitors I was using.

Bottom line, you own your equipment, you can modify to your heart's content as long as its for your personal enjoyment. Manufacturer's choice of parts used and/or voicing is not necessarily some kind of objective best, there may be some untapped potential they failed to uncover. 

@mapman Considering the amount of posts you post, your comment of - 'If you want to do it do it', is,,,, useless and unhelpful.