AFAIK, Sofirn is always very open to new, innovative ideas. However, until now they have been reluctant to implement some kind of an "embedded" USB-C port into any of their (third party) products. I have Zanflare's F1, too. I gave it to my parents for it can be driven with 2x CR123A, i.e. they can leave it somewhere lost for years in case a flashlight is ever needed but if they need it it will still work reliably. I do not know how good Zanflare's protection ring is regarding 'wear'n tear' if being moved back and forth many times but with two o-rings in place it should be fine.
So far, Sofirn and Wurkkos have been very successful selling their rechargeable lights with the classic charging design on the outside and I have never heard of defects that result from water ingress underneath the rubber boot. Don't get me wrong - I also favor the integrated design. The most important question they will certainly ask is: What is the benefit of an embedded USB port and will those extra costs for development, material and assembly time ever pay off?
Anyway, I will ask Mark to discuss the two options shown below with the manufacturer.
Edit: OP is updated with the latest design changes.