Like most of the others have mentioned so far, it would be nice to have labels or even categories for the arranger. Color categories would also be a nice addition to this, but the labels on some items need to be changed to assist with this.
First issue, not a fan of the multiple pages, I have to figure out which of the 6 pages I need (on this note it's a good think I put everything in alphabetical order before you did this). I've noticed when you pull something off one page and move to the next the new arranger seems to 'save' or 'reset' (not sure which is more accurate) but what I wanted out doesn't always move out.
Now to the second issue, the arranger seems to randomly move items from my inventory into the Locker while I am moving other items. I have tried a couple times to correct this and move the items back out but it doesn't always actually work.
Finally, my last issue, moving multiple items around at once seems to be more of a issue that it was with the previous arranger. I tried to move the 'Valentines' items up with the rest but after a couple tries they ended up at the bottom of the arranger. Glad they were still there but they just disappeared while trying to move them at one point.
General feedback: I actually kind of miss the old inventory arranger, it was almost easier to arrange and re-arrange than this current one. I liked that everything was one long list, made it easier to arrange my items. Also, I never really had a issue with items randomly moving into the locker that I seem to have with this new one. Finally, I really preferred the search feature from the old one that would start sorting through items as you typed, it was really helpful if I couldn't remember the name of a item exactly but knew what it started with.