Followup: my Access Stage 5 bag arrived today... FedEx' fault that I didn't get it in time for last night's gig, but no big deal. Anyway, I have two versions of the USA Sadowsky Portabag, so I compared with the more recent one which has a velcro flap at the butt end, same as the Access. Bottom line: I'm thrilled with the Access. Factor #1 for me: it's every bit as sturdy, requiring significant strength to warp/bend, unlike that one I returned. Other features are essentially equivalent.
Some say pocket space is limited on the Access, but I mostly disagree. Yeah, the large pocket on the Access is smaller than on the Portabag, but the Access has more pockets... a lot more. Some might worry about losing track of which items are in which pockets, but that's a 1st world problem IMO. The only downside I encountered: I have a 4" strap made of thick un-foldable leather that I keep rolled up. The large Sadowsky pocket has enough space to hold this, albeit awkwardly. No dice with the Access, the pockets don't billow out that much. TBH this is definitely NOT a problem for me... I haven't been in a metal band in a decade, and since then I've only used it as a novelty, e.g. Halloween. Aside from that strap (that I forgot about, TBH) I don't stuff pedals or other bulky items into case pockets, I use a padded mixer bag for misc crap like that.
TL;DR: the Stage 5 bag is a keeper, and sincere thanks to Bret at Access Cases for allowing me to make the Labor Day sale purchase, but not shipping until after I returned from vacation.