That effort should probably be devoted to giving us Shifters, a core race of the Eberron campaign setting (and probably the only race we're likely to see with a +2 to Wis), or to implement the Shapechange spell (or other spells from the Polymorph subschool).
Mounts are not going to do much to improve the paladin class. There are lots of areas where they won't be useful at all, they will probably be quite buggy, and really don't improve upon most of the areas for which paladins need help--DPS, solutions to their lack of feats (mounted combat typically comes with a series of feats needed to make it worthwhile, which paladins can't afford), tight AP, and being able to use their existing class features effectively (namely: healing, which kind of requires a 1 or 2 feat investment that they really can't afford).