I've switched from Baggins to ArkInventory 2.0 for two week now.
_ the "stacking" item: 38 warp burgers only use 1 visual cell with 38 print for quantity.
_ the empty stacking place: I've 20 to 25 free slots in bag and it's too many window space "wasted" to show all, an emply slot with 20 or 25 printed is enough (and think about Guild bank with 50 free room in a tab, TOO MANY SPACE wasted !).
_ the search option via Baggins_search addon.
I really like:
_ powerfull sorting options of AI, many cool options.
_ realiable addon.
The "NEW" items odd working: If I switch a ring which I'm currently waer, it's not a new item (ok, it's new in bag).. Same thing, when I use MrPlow.. Sometime, 80% of my bag is new ^^.
I'm planning to use the 2.20 beta to see if somes improvements are done (I've see the changelog).
There are a few settings you can change to get close to what you are wanting.
In particular, you can hide all empty slots, and just show a count of empty bag slots down the bottom. Just edit the bar that has the empty slots and unassign it.