Well, I hope you're at least partially joking. Her heal is already extremely strong as it is, it definitely does not need a buff in the slightest bit, if anything it should be nerfed in either ratio or having the (unwarranted) AS buff removed. Nidalee shouldn't be able to simply through spears all day long then just jump away in cougar form every time anyone gets close just to heal to full health with one or two E's at the most.
I feel like her power needs to be moved more into her cougar form and that the feel and play of the cougar form needs to be improved. As it stands the cougar form can feel a bit clunky and difficult to control with the detail necessary for strong mechanical play. I also feel that Nidalee needs to be forced in one direction or the other, she shouldn't be able to build full AP and still do consistent damage with her cougar form, build AD bruiser and get all the utility from her standard form, or build hybrid (not that I really see anyone doing that) and get both utility and strong base damage in cougar form.
I release that being a person with the name "Only Play Nid" you aren't going to like that view point, but I think it's a bit unrealistic to say that as far as Nidalee is concerned you're entirely objective. I want her to still be competitive and fun to play as, but she also needs to be fun to play against and have solid counterplay. As she is right now, she isn't healthy for the game.