Gear layout added to character planner to allow some sort of mid/end-game data calculations (e.g. spellpower, stats, melee power, double-strike, AC, dodge, DCs for various abilities/spells, etc.) There is a gear spreadsheet on the forums somewhere that already has all the gear data entered as of ~July 2016 -- I have a copy, but can't find the forum post right now). Neither of the current planners have integrated a gear planner, although I believe
Tom.JonesJr will be adding it soon to the new "Ron's Character Planner".
-I find Elissdee's character-planner-lite to be quick, and the forum export much clearer, but I really like the graphical enhancement selector of Ron's Character Planner (as I can't always remember the pre-reqs for the enhancements I want).
-A mobile character planner!! There is nothing out there right now for any mobile platform that I am aware of. I would use this all the time.
-Although it would be a lot of work, some sort of link to common build splits with descriptions might be helpful for the less-than-expert build planners (e.g. 6 fighter is often chosen for Kensai core +1 crit multiplier; Divine class 6 enables feat Blessing of Sylvanus for +2 crit range for mauls).
I am sure there are others, but those are off the top of my head.