As for the Chest spell. I plan to replace it with a "Conjure Luggage" spell. Think Color of Magic. If you haven't read/seen it, it will be a mechanical conjuration that has some basic combat abilities and can carry loot.
If you're redoing mark/recall, can you take a look at some of the excellent mark/recall scripts available for Morrowind? There was one in particular that had a menu that allowed arbitrary #s of mark points, auto-naming and manual renaming of mark points, companion support, and a number of other extremely useful features. Can't find the link right now, but will try.
PS think it's this one: http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=8153
Ambitious and unknown if even doable with SKSE, but it's worth investigating.