I have not read or heard that it has been updated. Easiest thing is probably if you just ask a boutique to confirm with TAG on whether any improvements have been made. Personally I doubt it but you never know!
OK, so here's an update from myself after I’ve been eventually able to stop over at the TH boutique in Geneva (Very welcoming reception, btw., as usual). Among the Heuer-signed folding clasps, they only had the 5042 in store (on a Cal.11 Monaco), but that was enough for me to conclude that: - 5042 looks indeed a bit flimsy. Actually, despite being designed for the same (?) type of straps (22 or 20/ 18/ 2mm) it looked flimsier than my “standard” (= TH shield-branded) 5037, which I wore on my wrist today (with a Cal.16 Carrera); - 5042 and 5037 do indeed use the same, “expansion-type” click mechanism; - By opposition (and even though I didn’t see it in the flesh) the “Heuer” 5049 can only be more appealing (more “material” and [presumably] different, peg-based click mechanism - although personally I haven't experienced any problems with the “expansion” ones so far); - Prices in CH: 90 CHF for 5042 vs. 115 CHF for 5049. Bottomline: I'll go with the 5049 and the strap from WSW that's designed for it. All things considered, that should be the one that goes best with a Vintage Autavia Viceroy anyways (due to its grained leather): https://www.watchstrapworld.com/20-...birthday-edition-carrera-model-no-cv2119.html
The cal11 Monaco uses the 5042? Damn shame to have such shitty clasp on the Monaco. I thought the Monaco had a 3mm clasp like the 5049 or similar