If you look at my first post in this thread, you'll note that my one attempt at contacting TNW has resulted (still) in no reply. Add to that the impression from their videos that it's basically a skateboard factory which happens to make firearms instead of skateboards (ie; a bunch of young dufus types with the owner seemingly vague, nervous, and not himself terribly technically adept), and one isn't left with a very good impression. I doubt they'd make any use at all of end user tips on upgrading functionality.
As for some running great, others not so much... as I've mentioned in a different thread, it's about exactly as easy to find videos where end users describe, often rather bitterly, their bad experiences with the JR Carbine for example, or the KelTec Sub2000. These guns have distinct weak points, places which could use some tweaking, some upgrading, or outright replacement of parts to get them working right. But I certainly understand the frustrations when a TNW product (or any other) doesn't work properly out of the box. A lot of folks expect to just unpack, assemble, shoot, never thinking about gunsmithing work along the way, maybe run a rag over it once in a while, a few drops of oil perhaps...
Again, I've just never really encountered a product like that. Even basic kitchenwares often need tweaking to get things working right. Knives with crappy edges, pots with weak handles, a coffee grinder with a flakey timer, an espresso machine costing $800 which almost immediately needs a homemade thermometer to time drawing a shot as the thermocouple fails and the company doesn't offer warranty support outside of Spain... it goes on and on. Stuff generally isn't well made. I found my Aero to be mostly ready to play with out of the box, but I refined it here and there, polishing everything that should be polished but wasn't because they're selling them for $800 Canadian dollars, which is basically pocket money. If I paid $2,000+ I'd be upset with rough machined finishes. At $800 I'm not complaining. My $2,000 Pardini air pistol needed precisely zero work, it just shot well, always has. I made a grip for it because no factory grip fitted my hand properly but that's not Pardini's fault. As the price goes up, I expect the factories to do better work, that's all. Discount prices equal sloppy finishing.