From memory Lynny cut off a big from the toe before a Sheild game to remove some weight. He said it was about 1oz but it's probably not the preferred method of weight reduction.
By no means am I involved with GN but I think the XP80s were made from the heavier oversized clefts. The majority of them were around the same weight as the Kabooms and 50+s. So in theory GN would get in a batch of oversized clefts and separate them into heavy clefts and lighter clefts. The lighter ones can be made thicker for the same weight. The XP80s are really good in 2.9-2.11 weights but you can get 50+/Kaboom in 2.12 so that probably makes more sense if you're in the shop. From my experience the XP80s probably didn't sell that well (especially compared to 50+ and Kaboom) and at the $700ish price point there's maybe some better options despite the rare shape.
My XP80 is 2-10 fully dressed, with extra grip and anti-scuff sheet, it weighs 2-11.3. I think toe is weak but rest of it goes like an over-caffeinated monkey on a trampoline! The discounted price these days is probably the better price for an XP80. If I could get a heavy one, I'd remove the toe by an inch to get the weight down.
People who got 2-12 Warner are very lucky! I can't seem to find one in that weight. Lightest I got is 2-13+.
If someone is lucky enough to land a new 2017 Warner replica, they will see some differences in the bat.