3C maxxterra shorty is pretty close to vertstar mary IMO so possibly the closest to what you want. Depends if you wanted the volume of the mary though.
But yep, definitely agree, I don’t like how weight goes up with grip. It cuts both ways too, the dual dhr2 seems to be a bit too delicate, which seems to be the other end of the same thing. And weirdly WTB decided not to do soft rubber versions of some of their 29ers at all so versions that’d be soft in 650b, are harder in 29.
I suppose you do run into other issues, vertstar is pretty short lived and I found the knobs broke up really badly. I don’t mind a bit of fast wear if the performance justifies it, but if the tread doesn’t hold up the tyre just stops working properly. Maxxgrip I’ve only used in a minion and it’s holding up far better but that doesn’t mean it’d work on the shorty’s spikes.
I’d like a lighter der baron but conti can’t do carcasses so they need a 1kg tyre just to make it adequate. The old Baron went the other way, great tyre while it lasted but the sidewalls wore out before the knobs were even really worn. And they ain’t cheap
It’s all a compromise tbh, you just have to hope to find the compromise you want.