There are ways, but they're certainly more expensive to design and mass-produce.
Vacheron, on the Overseas, for example (skip to 1:44). When the sides are extended, you can barely tell. That said, I think you only get maybe 3mm of extension total, but that's probably enough for most people, once the bracelet is properly sized. The Overseas (brand-insecurity aside---I get it, your logo is the Maltese cross!) has to be part of any serious discussion about best bracelet system in the industry.
The AT extension image posted above is... not reassuring. I do wish they could design something better. But, then, I wear an AT nearly every day and get by just fine without microadjust. If need be, I just reposition the watch on my wrist. Just me, but I'd much rather have a concealed clasp with no microadjust than a big bulky dive-style clasp with one. (On the AT, I mean---fine with dive clasps on dive watches.)