As someone who has an excessive amount of shops for relatively easy and cheap materials, it's a pain having to lock 72 individual shops in order to restock and remember which ones need to be unlocked again. For me, it would be a nice addition to just be able to lock and unlock the shops in the /shops owned GUI and maybe have a line of lore saying whether shops are locked or unlocked.
That's not really the point here, but I too often close my shops when I'm not willing to trade the item anymore for the time being or don't want people accessing it at all. Of course, I still don't have a shop that big to cause me any hassle but A GUI showing your shops and even teleporting you(or remote access them from where you stand) to them would be neat and fantastic.
This would be helpful for sure. A way to fully restock a shop without stocks selling out prior would be a good use of this. Egwhen I'm refilling my spawner profitshop, I stock an entire row at a time, then move on to the row above or below of chests. This way I know if the chests are stocked before the sell out right away lol. Otherwise its a never ending cycle of stocking one chest, did I stock that one? Did they sell out before a row got fully restocked? Etc. So for me this would be practical for shop restocking in bulks.
I don't really understand the need to lock a shop in order to restock it. This isn't a functionality I would use, ever. However if it would be a quality of life improvement for other people, and affects my life in no way whatsoever, then I'm in full support of it. Perhaps some sort of visual change if it's locked? If that's a thing they can do?